149312139 has 12 divisors (see below), whose sum is σ = 211483704. Its totient is φ = 93685504.

The previous prime is 149312129. The next prime is 149312147. The reversal of 149312139 is 931213941.

It is a happy number.

It is not a de Polignac number, because 149312139 - 2⁷ = 149312011 is a prime.

It is a super-2 number, since 2×149312139² = 44588229705510642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149312129) 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 in 11 ways as a sum of consecutive naturals, for example, 85242 + ... + 86975.

It is an arithmetic number, because the mean of its divisors is an integer number (17623642).

Almost surely, 2^149312139 is an apocalyptic number.

149312139 is a deficient number, since it is larger than the sum of its proper divisors (62171565).

149312139 is a wasteful number, since it uses less digits than its factorization.

149312139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172254 (or 172237 counting only the distinct ones).

The product of its digits is 5832, while the sum is 33.

The square root of 149312139 is about 12219.3346381871. The cubic root of 149312139 is about 530.5158606199.

The spelling of 149312139 in words is "one hundred forty-nine million, three hundred twelve thousand, one hundred thirty-nine".