79685287 has 4 divisors (see below), whose sum is σ = 86929416. Its totient is φ = 72441160.

The previous prime is 79685279. The next prime is 79685339. The reversal of 79685287 is 78258697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78258697 = 11 ⋅7114427.

It is not a de Polignac number, because 79685287 - 2³ = 79685279 is a prime.

It is a super-4 number, since 4×79685287⁴ (a number of 33 digits) contains 4444 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 (79685237) 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, 3622048 + ... + 3622069.

It is an arithmetic number, because the mean of its divisors is an integer number (21732354).

Almost surely, 2^79685287 is an apocalyptic number.

79685287 is a deficient number, since it is larger than the sum of its proper divisors (7244129).

79685287 is a wasteful number, since it uses less digits than its factorization.

79685287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7244128.

The product of its digits is 1693440, while the sum is 52.

The square root of 79685287 is about 8926.6615820249. The cubic root of 79685287 is about 430.3211716276.

The spelling of 79685287 in words is "seventy-nine million, six hundred eighty-five thousand, two hundred eighty-seven".