86644169 has 2 divisors, whose sum is σ = 86644170. Its totient is φ = 86644168.

The previous prime is 86644153. The next prime is 86644177. The reversal of 86644169 is 96144668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74995600 + 11648569 = 8660^2 + 3413^2 .

It is a cyclic number.

It is not a de Polignac number, because 86644169 - 2⁴ = 86644153 is a prime.

It is a super-2 number, since 2×86644169² = 15014424043401122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86644469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43322084 + 43322085.

It is an arithmetic number, because the mean of its divisors is an integer number (43322085).

Almost surely, 2^86644169 is an apocalyptic number.

It is an amenable number.

86644169 is a deficient number, since it is larger than the sum of its proper divisors (1).

86644169 is an equidigital number, since it uses as much as digits as its factorization.

86644169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 86644169 is about 9308.2849655562. The cubic root of 86644169 is about 442.4998355091.

The spelling of 86644169 in words is "eighty-six million, six hundred forty-four thousand, one hundred sixty-nine".