86774431 has 2 divisors, whose sum is σ = 86774432. Its totient is φ = 86774430.

The previous prime is 86774419. The next prime is 86774437. The reversal of 86774431 is 13447768.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86774431 - 2⁵ = 86774399 is a prime.

It is a super-2 number, since 2×86774431² = 15059603750747522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86774437) 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, 43387215 + 43387216.

It is an arithmetic number, because the mean of its divisors is an integer number (43387216).

Almost surely, 2^86774431 is an apocalyptic number.

86774431 is the 5892-nd centered pentagonal number.

86774431 is a deficient number, since it is larger than the sum of its proper divisors (1).

86774431 is an equidigital number, since it uses as much as digits as its factorization.

86774431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 86774431 is about 9315.2794375692. The cubic root of 86774431 is about 442.7214778589.

The spelling of 86774431 in words is "eighty-six million, seven hundred seventy-four thousand, four hundred thirty-one".