138999339 has 24 divisors (see below), whose sum is σ = 207280320. Its totient is φ = 89713008.

The previous prime is 138999317. The next prime is 138999347. The reversal of 138999339 is 933999831.

It is not a de Polignac number, because 138999339 - 2¹² = 138995243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138999139) 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 in 23 ways as a sum of consecutive naturals, for example, 33624 + ... + 37530.

It is an arithmetic number, because the mean of its divisors is an integer number (8636680).

Almost surely, 2^138999339 is an apocalyptic number.

138999339 is a deficient number, since it is larger than the sum of its proper divisors (68280981).

138999339 is a wasteful number, since it uses less digits than its factorization.

138999339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039 (or 4036 counting only the distinct ones).

The product of its digits is 1417176, while the sum is 54.

The square root of 138999339 is about 11789.7980898741. The cubic root of 138999339 is about 518.0093256223.

The spelling of 138999339 in words is "one hundred thirty-eight million, nine hundred ninety-nine thousand, three hundred thirty-nine".