149591812 has 6 divisors (see below), whose sum is σ = 261785678. Its totient is φ = 74795904.

The previous prime is 149591749. The next prime is 149591843. The reversal of 149591812 is 218195941.

It can be written as a sum of positive squares in only one way, i.e., 146264836 + 3326976 = 12094^2 + 1824^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18698973 + ... + 18698980.

Almost surely, 2^149591812 is an apocalyptic number.

It is an amenable number.

149591812 is a deficient number, since it is larger than the sum of its proper divisors (112193866).

149591812 is a wasteful number, since it uses less digits than its factorization.

149591812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37397957 (or 37397955 counting only the distinct ones).

The product of its digits is 25920, while the sum is 40.

The square root of 149591812 is about 12230.7731562645. The cubic root of 149591812 is about 530.8468862213.

The spelling of 149591812 in words is "one hundred forty-nine million, five hundred ninety-one thousand, eight hundred twelve".