7489977479 has 4 divisors (see below), whose sum is σ = 7884186840. Its totient is φ = 7095768120.

The previous prime is 7489977431. The next prime is 7489977499. The reversal of 7489977479 is 9747799847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9747799847 = 17 ⋅573399991.

It is a de Polignac number, because none of the positive numbers 2^k-7489977479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7489977409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197104652 + ... + 197104689.

It is an arithmetic number, because the mean of its divisors is an integer number (1971046710).

Almost surely, 2^7489977479 is an apocalyptic number.

7489977479 is a deficient number, since it is larger than the sum of its proper divisors (394209361).

7489977479 is a wasteful number, since it uses less digits than its factorization.

7489977479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394209360.

The product of its digits is 224042112, while the sum is 71.

The square root of 7489977479 is about 86544.6559817531. The cubic root of 7489977479 is about 1956.5615020510.

The spelling of 7489977479 in words is "seven billion, four hundred eighty-nine million, nine hundred seventy-seven thousand, four hundred seventy-nine".