139451908 has 6 divisors (see below), whose sum is σ = 244040846. Its totient is φ = 69725952.

The previous prime is 139451899. The next prime is 139451909. The reversal of 139451908 is 809154931.

It can be written as a sum of positive squares in only one way, i.e., 128640964 + 10810944 = 11342^2 + 3288^2 .

It is not an unprimeable number, because it can be changed into a prime (139451909) 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, 17431485 + ... + 17431492.

Almost surely, 2^139451908 is an apocalyptic number.

It is an amenable number.

139451908 is a deficient number, since it is larger than the sum of its proper divisors (104588938).

139451908 is a wasteful number, since it uses less digits than its factorization.

139451908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34862981 (or 34862979 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 139451908 is about 11808.9757388183. The cubic root of 139451908 is about 518.5709133981.

The spelling of 139451908 in words is "one hundred thirty-nine million, four hundred fifty-one thousand, nine hundred eight".