2498691989 has 4 divisors (see below), whose sum is σ = 2499901740. Its totient is φ = 2497482240.

The previous prime is 2498691983. The next prime is 2498692013. The reversal of 2498691989 is 9891968942.

2498691989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 814246225 + 1684445764 = 28535^2 + 41042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2498691989 is a prime.

It is a super-2 number, since 2×2498691989² = 12486923311785552242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2498691983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601772 + ... + 605909.

It is an arithmetic number, because the mean of its divisors is an integer number (624975435).

Almost surely, 2^2498691989 is an apocalyptic number.

It is an amenable number.

2498691989 is a deficient number, since it is larger than the sum of its proper divisors (1209751).

2498691989 is a wasteful number, since it uses less digits than its factorization.

2498691989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209750.

The product of its digits is 20155392, while the sum is 65.

The square root of 2498691989 is about 49986.9181786595. The cubic root of 2498691989 is about 1356.9720677980.

The spelling of 2498691989 in words is "two billion, four hundred ninety-eight million, six hundred ninety-one thousand, nine hundred eighty-nine".