86170649 has 2 divisors, whose sum is σ = 86170650. Its totient is φ = 86170648.

The previous prime is 86170619. The next prime is 86170691. The reversal of 86170649 is 94607168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68890000 + 17280649 = 8300^2 + 4157^2 .

It is a cyclic number.

It is not a de Polignac number, because 86170649 - 2⁸ = 86170393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86170619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43085324 + 43085325.

It is an arithmetic number, because the mean of its divisors is an integer number (43085325).

Almost surely, 2^86170649 is an apocalyptic number.

It is an amenable number.

86170649 is a deficient number, since it is larger than the sum of its proper divisors (1).

86170649 is an equidigital number, since it uses as much as digits as its factorization.

86170649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 86170649 is about 9282.8147132214. The cubic root of 86170649 is about 441.6922589814.

The spelling of 86170649 in words is "eighty-six million, one hundred seventy thousand, six hundred forty-nine".