86644297 has 2 divisors, whose sum is σ = 86644298. Its totient is φ = 86644296.

The previous prime is 86644279. The next prime is 86644307. The reversal of 86644297 is 79244668.

It is a happy number.

Together with previous prime (86644279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44342281 + 42302016 = 6659^2 + 6504^2 .

It is a cyclic number.

It is not a de Polignac number, because 86644297 - 2⁷ = 86644169 is a prime.

It is not a weakly prime, because it can be changed into another prime (86644247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43322148 + 43322149.

It is an arithmetic number, because the mean of its divisors is an integer number (43322149).

Almost surely, 2^86644297 is an apocalyptic number.

It is an amenable number.

86644297 is a deficient number, since it is larger than the sum of its proper divisors (1).

86644297 is an equidigital number, since it uses as much as digits as its factorization.

86644297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 46.

The square root of 86644297 is about 9308.2918411489. The cubic root of 86644297 is about 442.5000534116.

The spelling of 86644297 in words is "eighty-six million, six hundred forty-four thousand, two hundred ninety-seven".