149087657 has 2 divisors, whose sum is σ = 149087658. Its totient is φ = 149087656.

The previous prime is 149087651. The next prime is 149087677. The reversal of 149087657 is 756780941.

149087657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83978896 + 65108761 = 9164^2 + 8069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149087657 is a prime.

It is not a weakly prime, because it can be changed into another prime (149087651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74543828 + 74543829.

It is an arithmetic number, because the mean of its divisors is an integer number (74543829).

Almost surely, 2^149087657 is an apocalyptic number.

It is an amenable number.

149087657 is a deficient number, since it is larger than the sum of its proper divisors (1).

149087657 is an equidigital number, since it uses as much as digits as its factorization.

149087657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 149087657 is about 12210.1456584268. The cubic root of 149087657 is about 530.2498608283.

The spelling of 149087657 in words is "one hundred forty-nine million, eighty-seven thousand, six hundred fifty-seven".