149238157 has 2 divisors, whose sum is σ = 149238158. Its totient is φ = 149238156.

The previous prime is 149238127. The next prime is 149238161. The reversal of 149238157 is 751832941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148328041 + 910116 = 12179^2 + 954^2 .

It is a cyclic number.

It is not a de Polignac number, because 149238157 - 2⁷ = 149238029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149238127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74619078 + 74619079.

It is an arithmetic number, because the mean of its divisors is an integer number (74619079).

Almost surely, 2^149238157 is an apocalyptic number.

It is an amenable number.

149238157 is a deficient number, since it is larger than the sum of its proper divisors (1).

149238157 is an equidigital number, since it uses as much as digits as its factorization.

149238157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 149238157 is about 12216.3070115318. The cubic root of 149238157 is about 530.4282251719.

The spelling of 149238157 in words is "one hundred forty-nine million, two hundred thirty-eight thousand, one hundred fifty-seven".