86789616391 has 4 divisors (see below), whose sum is σ = 86790630672. Its totient is φ = 86788602112.

The previous prime is 86789616379. The next prime is 86789616451. The reversal of 86789616391 is 19361698768.

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 86789616391 - 2²³ = 86781227783 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 (86789616311) 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, 365626 + ... + 554311.

It is an arithmetic number, because the mean of its divisors is an integer number (21697657668).

Almost surely, 2^86789616391 is an apocalyptic number.

86789616391 is a deficient number, since it is larger than the sum of its proper divisors (1014281).

86789616391 is an equidigital number, since it uses as much as digits as its factorization.

86789616391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014280.

The product of its digits is 23514624, while the sum is 64.

The spelling of 86789616391 in words is "eighty-six billion, seven hundred eighty-nine million, six hundred sixteen thousand, three hundred ninety-one".