7488998521 has 3 divisors (see below), whose sum is σ = 7489085061. Its totient is φ = 7488911982.

The previous prime is 7488998477. The next prime is 7488998591. The reversal of 7488998521 is 1258998847.

The square root of 7488998521 is 86539.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1258998847 = 191 ⋅6591617.

It is a de Polignac number, because none of the positive numbers 2^k-7488998521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7488998521.

It is not an unprimeable number, because it can be changed into a prime (7488998591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 43270 + ... + 129808.

It is an arithmetic number, because the mean of its divisors is an integer number (2496361687).

Almost surely, 2^7488998521 is an apocalyptic number.

7488998521 is the 86539-th square number.

7488998521 is the 43270-th centered octagonal number.

It is an amenable number.

7488998521 is a deficient number, since it is larger than the sum of its proper divisors (86540).

7488998521 is an frugal number, since it uses more digits than its factorization.

7488998521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173078 (or 86539 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 61.

The cubic root of 7488998521 is about 1956.4762559118.

It can be divided in two parts, 7488 and 998521, that added together give a square (1006009 = 1003²).

The spelling of 7488998521 in words is "seven billion, four hundred eighty-eight million, nine hundred ninety-eight thousand, five hundred twenty-one".