149807931 has 32 divisors (see below), whose sum is σ = 252499968. Its totient is φ = 76878720.

The previous prime is 149807929. The next prime is 149807963. The reversal of 149807931 is 139708941.

It is a happy number.

It is not a de Polignac number, because 149807931 - 2¹ = 149807929 is a prime.

It is a super-2 number, since 2×149807931² = 44884832381001522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149803931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2686 + ... + 17516.

It is an arithmetic number, because the mean of its divisors is an integer number (7890624).

Almost surely, 2^149807931 is an apocalyptic number.

149807931 is a deficient number, since it is larger than the sum of its proper divisors (102692037).

149807931 is a wasteful number, since it uses less digits than its factorization.

149807931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14891.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 149807931 is about 12239.6050181368. The cubic root of 149807931 is about 531.1024057621.

The spelling of 149807931 in words is "one hundred forty-nine million, eight hundred seven thousand, nine hundred thirty-one".