139308388 has 6 divisors (see below), whose sum is σ = 243789686. Its totient is φ = 69654192.

The previous prime is 139308349. The next prime is 139308397. The reversal of 139308388 is 883803931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 137170944 + 2137444 = 11712^2 + 1462^2 .

It is an unprimeable number.

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, 17413545 + ... + 17413552.

Almost surely, 2^139308388 is an apocalyptic number.

It is an amenable number.

139308388 is a deficient number, since it is larger than the sum of its proper divisors (104481298).

139308388 is a wasteful number, since it uses less digits than its factorization.

139308388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34827101 (or 34827099 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 139308388 is about 11802.8974408829. The cubic root of 139308388 is about 518.3929527776.

The spelling of 139308388 in words is "one hundred thirty-nine million, three hundred eight thousand, three hundred eighty-eight".