79542489 has 32 divisors (see below), whose sum is σ = 118316800. Its totient is φ = 47215872.

The previous prime is 79542481. The next prime is 79542499. The reversal of 79542489 is 98424597.

It is not a de Polignac number, because 79542489 - 2³ = 79542481 is a prime.

It is a super-3 number, since 3×79542489³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79542481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287019 + ... + 287295.

It is an arithmetic number, because the mean of its divisors is an integer number (3697400).

Almost surely, 2^79542489 is an apocalyptic number.

It is an amenable number.

79542489 is a deficient number, since it is larger than the sum of its proper divisors (38774311).

79542489 is a wasteful number, since it uses less digits than its factorization.

79542489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529.

The product of its digits is 725760, while the sum is 48.

The square root of 79542489 is about 8918.6595965986. The cubic root of 79542489 is about 430.0639692103.

The spelling of 79542489 in words is "seventy-nine million, five hundred forty-two thousand, four hundred eighty-nine".