139513387 has 12 divisors (see below), whose sum is σ = 151619160. Its totient is φ = 128314368.

The previous prime is 139513349. The next prime is 139513391. The reversal of 139513387 is 783315931.

It is not a de Polignac number, because 139513387 - 2⁷ = 139513259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139511387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50539 + ... + 53227.

It is an arithmetic number, because the mean of its divisors is an integer number (12634930).

Almost surely, 2^139513387 is an apocalyptic number.

139513387 is a deficient number, since it is larger than the sum of its proper divisors (12105773).

139513387 is a wasteful number, since it uses less digits than its factorization.

139513387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022 (or 3009 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 139513387 is about 11811.5785143223. The cubic root of 139513387 is about 518.6471082137.

The spelling of 139513387 in words is "one hundred thirty-nine million, five hundred thirteen thousand, three hundred eighty-seven".