79877865 has 8 divisors (see below), whose sum is σ = 127804608. Its totient is φ = 42601520.

The previous prime is 79877821. The next prime is 79877887. The reversal of 79877865 is 56877897.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79877865 - 2⁶ = 79877801 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2662581 + ... + 2662610.

It is an arithmetic number, because the mean of its divisors is an integer number (15975576).

Almost surely, 2^79877865 is an apocalyptic number.

It is an amenable number.

79877865 is a deficient number, since it is larger than the sum of its proper divisors (47926743).

79877865 is a wasteful number, since it uses less digits than its factorization.

79877865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325199.

The product of its digits is 5927040, while the sum is 57.

The square root of 79877865 is about 8937.4417480619. The cubic root of 79877865 is about 430.6675497553.

The spelling of 79877865 in words is "seventy-nine million, eight hundred seventy-seven thousand, eight hundred sixty-five".