139065939 has 6 divisors (see below), whose sum is σ = 200873036. Its totient is φ = 92710620.

The previous prime is 139065931. The next prime is 139065947. The reversal of 139065939 is 939560931.

139065939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (139065931) and next prime (139065947).

It is not a de Polignac number, because 139065939 - 2³ = 139065931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139065894 and 139065903.

It is not an unprimeable number, because it can be changed into a prime (139065931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7725877 + ... + 7725894.

Almost surely, 2^139065939 is an apocalyptic number.

139065939 is a deficient number, since it is larger than the sum of its proper divisors (61807097).

139065939 is a wasteful number, since it uses less digits than its factorization.

139065939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15451777 (or 15451774 counting only the distinct ones).

The product of its (nonzero) digits is 196830, while the sum is 45.

The square root of 139065939 is about 11792.6222274777. The cubic root of 139065939 is about 518.0920452304.

The spelling of 139065939 in words is "one hundred thirty-nine million, sixty-five thousand, nine hundred thirty-nine".