79881385 has 16 divisors (see below), whose sum is σ = 102456576. Its totient is φ = 59577088.

The previous prime is 79881379. The next prime is 79881421. The reversal of 79881385 is 58318897.

It is a cyclic number.

It is not a de Polignac number, because 79881385 - 2⁹ = 79880873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4704 + ... + 13486.

It is an arithmetic number, because the mean of its divisors is an integer number (6403536).

Almost surely, 2^79881385 is an apocalyptic number.

It is an amenable number.

79881385 is a deficient number, since it is larger than the sum of its proper divisors (22575191).

79881385 is a wasteful number, since it uses less digits than its factorization.

79881385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8912.

The product of its digits is 483840, while the sum is 49.

The square root of 79881385 is about 8937.6386702529. The cubic root of 79881385 is about 430.6738757778.

The spelling of 79881385 in words is "seventy-nine million, eight hundred eighty-one thousand, three hundred eighty-five".