149255657 has 2 divisors, whose sum is σ = 149255658. Its totient is φ = 149255656.

The previous prime is 149255651. The next prime is 149255681. The reversal of 149255657 is 756552941.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111112681 + 38142976 = 10541^2 + 6176^2 .

It is an emirp because it is prime and its reverse (756552941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149255657 - 2⁴ = 149255641 is a prime.

It is a super-2 number, since 2×149255657² = 44554502293003298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (149255651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74627828 + 74627829.

It is an arithmetic number, because the mean of its divisors is an integer number (74627829).

Almost surely, 2^149255657 is an apocalyptic number.

It is an amenable number.

149255657 is a deficient number, since it is larger than the sum of its proper divisors (1).

149255657 is an equidigital number, since it uses as much as digits as its factorization.

149255657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378000, while the sum is 44.

The square root of 149255657 is about 12217.0232462740. The cubic root of 149255657 is about 530.4489574281.

The spelling of 149255657 in words is "one hundred forty-nine million, two hundred fifty-five thousand, six hundred fifty-seven".