860079391 has 4 divisors (see below), whose sum is σ = 860741784. Its totient is φ = 859417000.

The previous prime is 860079379. The next prime is 860079401. The reversal of 860079391 is 193970068.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 860079391 - 2⁵ = 860079359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860079301) 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, 329245 + ... + 331846.

It is an arithmetic number, because the mean of its divisors is an integer number (215185446).

Almost surely, 2^860079391 is an apocalyptic number.

860079391 is a deficient number, since it is larger than the sum of its proper divisors (662393).

860079391 is a wasteful number, since it uses less digits than its factorization.

860079391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662392.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 860079391 is about 29327.1101713074. The cubic root of 860079391 is about 950.9978033292.

The spelling of 860079391 in words is "eight hundred sixty million, seventy-nine thousand, three hundred ninety-one".