86939309771 has 2 divisors, whose sum is σ = 86939309772. Its totient is φ = 86939309770.

The previous prime is 86939309761. The next prime is 86939309783. The reversal of 86939309771 is 17790393968.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86939309771 - 2¹⁸ = 86939047627 is a prime.

It is not a weakly prime, because it can be changed into another prime (86939309741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43469654885 + 43469654886.

It is an arithmetic number, because the mean of its divisors is an integer number (43469654886).

Almost surely, 2^86939309771 is an apocalyptic number.

86939309771 is a deficient number, since it is larger than the sum of its proper divisors (1).

86939309771 is an equidigital number, since it uses as much as digits as its factorization.

86939309771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15431472, while the sum is 62.

The spelling of 86939309771 in words is "eighty-six billion, nine hundred thirty-nine million, three hundred nine thousand, seven hundred seventy-one".