149681908 has 6 divisors (see below), whose sum is σ = 261943346. Its totient is φ = 74840952.

The previous prime is 149681897. The next prime is 149681941. The reversal of 149681908 is 809186941.

It can be written as a sum of positive squares in only one way, i.e., 83942244 + 65739664 = 9162^2 + 8108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18710235 + ... + 18710242.

Almost surely, 2^149681908 is an apocalyptic number.

It is an amenable number.

149681908 is a deficient number, since it is larger than the sum of its proper divisors (112261438).

149681908 is a wasteful number, since it uses less digits than its factorization.

149681908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37420481 (or 37420479 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 149681908 is about 12234.4557704869. The cubic root of 149681908 is about 530.9534374687.

The spelling of 149681908 in words is "one hundred forty-nine million, six hundred eighty-one thousand, nine hundred eight".