86836691 has 2 divisors, whose sum is σ = 86836692. Its totient is φ = 86836690.

The previous prime is 86836681. The next prime is 86836693. The reversal of 86836691 is 19663868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86836691 - 2²² = 82642387 is a prime.

It is a super-2 number, since 2×86836691² = 15081221807658962, which contains 22 as substring.

Together with 86836693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86836693) 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, 43418345 + 43418346.

It is an arithmetic number, because the mean of its divisors is an integer number (43418346).

Almost surely, 2^86836691 is an apocalyptic number.

86836691 is a deficient number, since it is larger than the sum of its proper divisors (1).

86836691 is an equidigital number, since it uses as much as digits as its factorization.

86836691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 47.

The square root of 86836691 is about 9318.6206597329. The cubic root of 86836691 is about 442.8273356530.

It can be divided in two parts, 868366 and 91, that multiplied together give a triangular number (79021306 = T₁₂₅₇₁).

The spelling of 86836691 in words is "eighty-six million, eight hundred thirty-six thousand, six hundred ninety-one".