86681958739 has 2 divisors, whose sum is σ = 86681958740. Its totient is φ = 86681958738.

The previous prime is 86681958703. The next prime is 86681958763. The reversal of 86681958739 is 93785918668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86681958739 - 2²⁵ = 86648404307 is a prime.

It is not a weakly prime, because it can be changed into another prime (86681958439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43340979369 + 43340979370.

It is an arithmetic number, because the mean of its divisors is an integer number (43340979370).

Almost surely, 2^86681958739 is an apocalyptic number.

86681958739 is a deficient number, since it is larger than the sum of its proper divisors (1).

86681958739 is an equidigital number, since it uses as much as digits as its factorization.

86681958739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156764160, while the sum is 70.

The spelling of 86681958739 in words is "eighty-six billion, six hundred eighty-one million, nine hundred fifty-eight thousand, seven hundred thirty-nine".