86115719 has 2 divisors, whose sum is σ = 86115720. Its totient is φ = 86115718.

The previous prime is 86115683. The next prime is 86115769. The reversal of 86115719 is 91751168.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86115719 is a prime.

It is a super-2 number, since 2×86115719² = 14831834117773922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86115769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43057859 + 43057860.

It is an arithmetic number, because the mean of its divisors is an integer number (43057860).

Almost surely, 2^86115719 is an apocalyptic number.

86115719 is a deficient number, since it is larger than the sum of its proper divisors (1).

86115719 is an equidigital number, since it uses as much as digits as its factorization.

86115719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 38.

The square root of 86115719 is about 9279.8555484447. The cubic root of 86115719 is about 441.5983859003.

The spelling of 86115719 in words is "eighty-six million, one hundred fifteen thousand, seven hundred nineteen".