86155739 has 2 divisors, whose sum is σ = 86155740. Its totient is φ = 86155738.

The previous prime is 86155733. The next prime is 86155757. The reversal of 86155739 is 93755168.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86155739 is a prime.

It is a super-2 number, since 2×86155739² = 14845622725272242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86155739.

It is not a weakly prime, because it can be changed into another prime (86155733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43077869 + 43077870.

It is an arithmetic number, because the mean of its divisors is an integer number (43077870).

Almost surely, 2^86155739 is an apocalyptic number.

86155739 is a deficient number, since it is larger than the sum of its proper divisors (1).

86155739 is an equidigital number, since it uses as much as digits as its factorization.

86155739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 86155739 is about 9282.0115815485. The cubic root of 86155739 is about 441.6667823583. Note that the first 3 decimals are identical.

The spelling of 86155739 in words is "eighty-six million, one hundred fifty-five thousand, seven hundred thirty-nine".