13775491 has 16 divisors (see below), whose sum is σ = 15069888. Its totient is φ = 12544000.

The previous prime is 13775479. The next prime is 13775519. The reversal of 13775491 is 19457731.

It is a cyclic number.

It is not a de Polignac number, because 13775491 - 2¹¹ = 13773443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13775491.

It is not an unprimeable number, because it can be changed into a prime (13775441) 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, 121851 + ... + 121963.

It is an arithmetic number, because the mean of its divisors is an integer number (941868).

Almost surely, 2^13775491 is an apocalyptic number.

13775491 is a deficient number, since it is larger than the sum of its proper divisors (1294397).

13775491 is a wasteful number, since it uses less digits than its factorization.

13775491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302.

The product of its digits is 26460, while the sum is 37.

The square root of 13775491 is about 3711.5348577105. The cubic root of 13775491 is about 239.7189476220.

The spelling of 13775491 in words is "thirteen million, seven hundred seventy-five thousand, four hundred ninety-one".