139959939 has 8 divisors (see below), whose sum is σ = 213272320. Its totient is φ = 79977096.

The previous prime is 139959931. The next prime is 139959943. The reversal of 139959939 is 939959931.

139959939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139959939 - 2³ = 139959931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139959931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3332359 + ... + 3332400.

It is an arithmetic number, because the mean of its divisors is an integer number (26659040).

Almost surely, 2^139959939 is an apocalyptic number.

139959939 is a deficient number, since it is larger than the sum of its proper divisors (73312381).

139959939 is an equidigital number, since it uses as much as digits as its factorization.

139959939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6664769.

The product of its digits is 2657205, while the sum is 57.

The square root of 139959939 is about 11830.4665588471. The cubic root of 139959939 is about 519.1998777207.

The spelling of 139959939 in words is "one hundred thirty-nine million, nine hundred fifty-nine thousand, nine hundred thirty-nine".