86504070391 has 4 divisors (see below), whose sum is σ = 89486969400. Its totient is φ = 83521171384.

The previous prime is 86504070353. The next prime is 86504070403. The reversal of 86504070391 is 19307040568.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86504070391 is a prime.

It is a super-2 number, since 2×86504070391² (a number of 23 digits) 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 (86504079391) 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, 1491449461 + ... + 1491449518.

It is an arithmetic number, because the mean of its divisors is an integer number (22371742350).

Almost surely, 2^86504070391 is an apocalyptic number.

86504070391 is a deficient number, since it is larger than the sum of its proper divisors (2982899009).

86504070391 is a wasteful number, since it uses less digits than its factorization.

86504070391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982899008.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 86504070391 in words is "eighty-six billion, five hundred four million, seventy thousand, three hundred ninety-one".