79989425 has 6 divisors (see below), whose sum is σ = 99186918. Its totient is φ = 63991520.

The previous prime is 79989419. The next prime is 79989439. The reversal of 79989425 is 52498997.

It can be written as a sum of positive squares in 3 ways, for example, as 351649 + 79637776 = 593^2 + 8924^2 .

It is not a de Polignac number, because 79989425 - 2¹⁶ = 79923889 is a prime.

It is a super-2 number, since 2×79989425² = 12796616223661250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1599764 + ... + 1599813.

It is an arithmetic number, because the mean of its divisors is an integer number (16531153).

Almost surely, 2^79989425 is an apocalyptic number.

It is an amenable number.

79989425 is a deficient number, since it is larger than the sum of its proper divisors (19197493).

79989425 is a wasteful number, since it uses less digits than its factorization.

79989425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199587 (or 3199582 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 53.

The square root of 79989425 is about 8943.6807299903. The cubic root of 79989425 is about 430.8679512140.

The spelling of 79989425 in words is "seventy-nine million, nine hundred eighty-nine thousand, four hundred twenty-five".