139001403 has 4 divisors (see below), whose sum is σ = 185335208. Its totient is φ = 92667600.

The previous prime is 139001399. The next prime is 139001411. The reversal of 139001403 is 304100931.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 139001403 - 2² = 139001399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139001403.

It is not an unprimeable number, because it can be changed into a prime (139002403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23166898 + ... + 23166903.

It is an arithmetic number, because the mean of its divisors is an integer number (46333802).

Almost surely, 2^139001403 is an apocalyptic number.

139001403 is a deficient number, since it is larger than the sum of its proper divisors (46333805).

139001403 is an equidigital number, since it uses as much as digits as its factorization.

139001403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46333804.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 139001403 is about 11789.8856228549. The cubic root of 139001403 is about 518.0118895817.

The spelling of 139001403 in words is "one hundred thirty-nine million, one thousand, four hundred three".