86817149 has 2 divisors, whose sum is σ = 86817150. Its totient is φ = 86817148.

The previous prime is 86817119. The next prime is 86817161. The reversal of 86817149 is 94171868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58033924 + 28783225 = 7618^2 + 5365^2 .

It is a cyclic number.

It is not a de Polignac number, because 86817149 - 2⁸ = 86816893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86817119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43408574 + 43408575.

It is an arithmetic number, because the mean of its divisors is an integer number (43408575).

Almost surely, 2^86817149 is an apocalyptic number.

It is an amenable number.

86817149 is a deficient number, since it is larger than the sum of its proper divisors (1).

86817149 is an equidigital number, since it uses as much as digits as its factorization.

86817149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 44.

The square root of 86817149 is about 9317.5720549937. The cubic root of 86817149 is about 442.7941147455.

The spelling of 86817149 in words is "eighty-six million, eight hundred seventeen thousand, one hundred forty-nine".