79507489 has 4 divisors (see below), whose sum is σ = 79681924. Its totient is φ = 79333056.

The previous prime is 79507459. The next prime is 79507499. The reversal of 79507489 is 98470597.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98470597 = 19 ⋅5182663.

It can be written as a sum of positive squares in 2 ways, for example, as 60715264 + 18792225 = 7792^2 + 4335^2 .

It is a cyclic number.

It is not a de Polignac number, because 79507489 - 2⁷ = 79507361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79507429) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 86532 + ... + 87445.

It is an arithmetic number, because the mean of its divisors is an integer number (19920481).

Almost surely, 2^79507489 is an apocalyptic number.

It is an amenable number.

79507489 is a deficient number, since it is larger than the sum of its proper divisors (174435).

79507489 is a wasteful number, since it uses less digits than its factorization.

79507489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174434.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 79507489 is about 8916.6972024399. The cubic root of 79507489 is about 430.0008815558. Note that the first 3 decimals are identical.

The spelling of 79507489 in words is "seventy-nine million, five hundred seven thousand, four hundred eighty-nine".