79587917 has 4 divisors (see below), whose sum is σ = 79875516. Its totient is φ = 79300320.

The previous prime is 79587913. The next prime is 79587961. The reversal of 79587917 is 71978597.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71978597 = 61 ⋅1179977.

It can be written as a sum of positive squares in 2 ways, for example, as 55636681 + 23951236 = 7459^2 + 4894^2 .

It is a cyclic number.

It is not a de Polignac number, because 79587917 - 2² = 79587913 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 (79587913) 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, 143384 + ... + 143937.

It is an arithmetic number, because the mean of its divisors is an integer number (19968879).

Almost surely, 2^79587917 is an apocalyptic number.

It is an amenable number.

79587917 is a deficient number, since it is larger than the sum of its proper divisors (287599).

79587917 is a wasteful number, since it uses less digits than its factorization.

79587917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287598.

The product of its digits is 1111320, while the sum is 53.

The square root of 79587917 is about 8921.2060283350. The cubic root of 79587917 is about 430.1458257884.

The spelling of 79587917 in words is "seventy-nine million, five hundred eighty-seven thousand, nine hundred seventeen".