78792881 has 4 divisors (see below), whose sum is σ = 78822000. Its totient is φ = 78763764.

The previous prime is 78792853. The next prime is 78792887. The reversal of 78792881 is 18829787.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78792881 - 2²⁶ = 11684017 is a prime.

It is a super-2 number, since 2×78792881² = 12416636192560322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78792887) 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, 10031 + ... + 16068.

It is an arithmetic number, because the mean of its divisors is an integer number (19705500).

Almost surely, 2^78792881 is an apocalyptic number.

It is an amenable number.

78792881 is a deficient number, since it is larger than the sum of its proper divisors (29119).

78792881 is a wasteful number, since it uses less digits than its factorization.

78792881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29118.

The product of its digits is 451584, while the sum is 50.

The square root of 78792881 is about 8876.5354164787. The cubic root of 78792881 is about 428.7087294634.

The spelling of 78792881 in words is "seventy-eight million, seven hundred ninety-two thousand, eight hundred eighty-one".