149315657 has 2 divisors, whose sum is σ = 149315658. Its totient is φ = 149315656.

The previous prime is 149315629. The next prime is 149315669. The reversal of 149315657 is 756513941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126810121 + 22505536 = 11261^2 + 4744^2 .

It is a cyclic number.

It is not a de Polignac number, because 149315657 - 2⁸ = 149315401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149315687) 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, 74657828 + 74657829.

It is an arithmetic number, because the mean of its divisors is an integer number (74657829).

Almost surely, 2^149315657 is an apocalyptic number.

It is an amenable number.

149315657 is a deficient number, since it is larger than the sum of its proper divisors (1).

149315657 is an equidigital number, since it uses as much as digits as its factorization.

149315657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The square root of 149315657 is about 12219.4785895307. The cubic root of 149315657 is about 530.5200271490.

The spelling of 149315657 in words is "one hundred forty-nine million, three hundred fifteen thousand, six hundred fifty-seven".