79542861 has 4 divisors (see below), whose sum is σ = 106057152. Its totient is φ = 53028572.

The previous prime is 79542857. The next prime is 79542893. The reversal of 79542861 is 16824597.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16824597 = 3 ⋅5608199.

It is a cyclic number.

It is not a de Polignac number, because 79542861 - 2² = 79542857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79542821) 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, 13257141 + ... + 13257146.

It is an arithmetic number, because the mean of its divisors is an integer number (26514288).

Almost surely, 2^79542861 is an apocalyptic number.

It is an amenable number.

79542861 is a deficient number, since it is larger than the sum of its proper divisors (26514291).

79542861 is a wasteful number, since it uses less digits than its factorization.

79542861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26514290.

The product of its digits is 120960, while the sum is 42.

The square root of 79542861 is about 8918.6804517260. The cubic root of 79542861 is about 430.0646396426.

The spelling of 79542861 in words is "seventy-nine million, five hundred forty-two thousand, eight hundred sixty-one".