79085861 has 4 divisors (see below), whose sum is σ = 79247424. Its totient is φ = 78924300.

The previous prime is 79085849. The next prime is 79085863. The reversal of 79085861 is 16858097.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16858097 = 271 ⋅62207.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79085861 is a prime.

It is a super-2 number, since 2×79085861² = 12509146820222642, which contains 22 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 (79085863) 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, 80045 + ... + 81026.

It is an arithmetic number, because the mean of its divisors is an integer number (19811856).

Almost surely, 2^79085861 is an apocalyptic number.

It is an amenable number.

79085861 is a deficient number, since it is larger than the sum of its proper divisors (161563).

79085861 is a wasteful number, since it uses less digits than its factorization.

79085861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161562.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 79085861 is about 8893.0231642563. The cubic root of 79085861 is about 429.2394361456.

The spelling of 79085861 in words is "seventy-nine million, eighty-five thousand, eight hundred sixty-one".