13631403 has 4 divisors (see below), whose sum is σ = 18175208. Its totient is φ = 9087600.

The previous prime is 13631383. The next prime is 13631411. The reversal of 13631403 is 30413631.

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

It is not a de Polignac number, because 13631403 - 2⁹ = 13630891 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 13631403.

It is not an unprimeable number, because it can be changed into a prime (13631003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2271898 + ... + 2271903.

It is an arithmetic number, because the mean of its divisors is an integer number (4543802).

Almost surely, 2^13631403 is an apocalyptic number.

13631403 is a deficient number, since it is larger than the sum of its proper divisors (4543805).

13631403 is an equidigital number, since it uses as much as digits as its factorization.

13631403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543804.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 13631403 is about 3692.0729949447. The cubic root of 13631403 is about 238.8802175167.

The spelling of 13631403 in words is "thirteen million, six hundred thirty-one thousand, four hundred three".