13138731403 has 4 divisors (see below), whose sum is σ = 15015693040. Its totient is φ = 11261769768.

The previous prime is 13138731343. The next prime is 13138731407. The reversal of 13138731403 is 30413783131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13138731403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13138731407) 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, 938480808 + ... + 938480821.

It is an arithmetic number, because the mean of its divisors is an integer number (3753923260).

Almost surely, 2^13138731403 is an apocalyptic number.

13138731403 is a deficient number, since it is larger than the sum of its proper divisors (1876961637).

13138731403 is an equidigital number, since it uses as much as digits as its factorization.

13138731403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876961636.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 13138731403 in words is "thirteen billion, one hundred thirty-eight million, seven hundred thirty-one thousand, four hundred three".