13091403 has 16 divisors (see below), whose sum is σ = 18986240. Its totient is φ = 7975584.

The previous prime is 13091369. The next prime is 13091413. The reversal of 13091403 is 30419031.

13091403 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 13091403 - 2⁸ = 13091147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13091403.

It is not an unprimeable number, because it can be changed into a prime (13091413) 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, 2388 + ... + 5646.

It is an arithmetic number, because the mean of its divisors is an integer number (1186640).

Almost surely, 2^13091403 is an apocalyptic number.

13091403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13091403 is a deficient number, since it is larger than the sum of its proper divisors (5894837).

13091403 is a wasteful number, since it uses less digits than its factorization.

13091403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378.

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

The square root of 13091403 is about 3618.2043889200. The cubic root of 13091403 is about 235.6832567315.

The spelling of 13091403 in words is "thirteen million, ninety-one thousand, four hundred three".