139394013 has 24 divisors (see below), whose sum is σ = 214006176. Its totient is φ = 80028000.

The previous prime is 139394009. The next prime is 139394027. The reversal of 139394013 is 310493931.

It is not a de Polignac number, because 139394013 - 2² = 139394009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139394063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6063 + ... + 17763.

It is an arithmetic number, because the mean of its divisors is an integer number (8916924).

Almost surely, 2^139394013 is an apocalyptic number.

It is an amenable number.

139394013 is a deficient number, since it is larger than the sum of its proper divisors (74612163).

139394013 is a wasteful number, since it uses less digits than its factorization.

139394013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11753 (or 11734 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 139394013 is about 11806.5241709828. The cubic root of 139394013 is about 518.4991399837.

The spelling of 139394013 in words is "one hundred thirty-nine million, three hundred ninety-four thousand, thirteen".