139707939 has 16 divisors (see below), whose sum is σ = 213850112. Its totient is φ = 79472448.

The previous prime is 139707937. The next prime is 139707943. The reversal of 139707939 is 939707931.

It is not a de Polignac number, because 139707939 - 2¹ = 139707937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139707937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10234 + ... + 19599.

It is an arithmetic number, because the mean of its divisors is an integer number (13365632).

Almost surely, 2^139707939 is an apocalyptic number.

139707939 is a deficient number, since it is larger than the sum of its proper divisors (74142173).

139707939 is a wasteful number, since it uses less digits than its factorization.

139707939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30066.

The product of its (nonzero) digits is 321489, while the sum is 48.

The square root of 139707939 is about 11819.8112929099. The cubic root of 139707939 is about 518.8880814208. Note that the first 3 decimals are identical.

The spelling of 139707939 in words is "one hundred thirty-nine million, seven hundred seven thousand, nine hundred thirty-nine".