139103993 has 16 divisors (see below), whose sum is σ = 164668800. Its totient is φ = 117433008.

The previous prime is 139103983. The next prime is 139104061. The reversal of 139103993 is 399301931.

139103993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139103993 - 2⁶ = 139103929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139103903) 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, 19955 + ... + 26007.

It is an arithmetic number, because the mean of its divisors is an integer number (10291800).

Almost surely, 2^139103993 is an apocalyptic number.

It is an amenable number.

139103993 is a deficient number, since it is larger than the sum of its proper divisors (25564807).

139103993 is an frugal number, since it uses more digits than its factorization.

139103993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6141 (or 6127 counting only the distinct ones).

The product of its (nonzero) digits is 19683, while the sum is 38.

The square root of 139103993 is about 11794.2355835383. The cubic root of 139103993 is about 518.1392978186.

The spelling of 139103993 in words is "one hundred thirty-nine million, one hundred three thousand, nine hundred ninety-three".