86436257 has 2 divisors, whose sum is σ = 86436258. Its totient is φ = 86436256.

The previous prime is 86436253. The next prime is 86436271. The reversal of 86436257 is 75263468.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65788321 + 20647936 = 8111^2 + 4544^2 .

It is a cyclic number.

It is not a de Polignac number, because 86436257 - 2² = 86436253 is a prime.

It is not a weakly prime, because it can be changed into another prime (86436253) 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, 43218128 + 43218129.

It is an arithmetic number, because the mean of its divisors is an integer number (43218129).

Almost surely, 2^86436257 is an apocalyptic number.

It is an amenable number.

86436257 is a deficient number, since it is larger than the sum of its proper divisors (1).

86436257 is an equidigital number, since it uses as much as digits as its factorization.

86436257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 41.

The square root of 86436257 is about 9297.1101424045. The cubic root of 86436257 is about 442.1456100453.

The spelling of 86436257 in words is "eighty-six million, four hundred thirty-six thousand, two hundred fifty-seven".