13901491 has 4 divisors (see below), whose sum is σ = 13923184. Its totient is φ = 13879800.

The previous prime is 13901477. The next prime is 13901497. The reversal of 13901491 is 19410931.

It is a happy number.

13901491 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13901491 - 2¹¹ = 13899443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13901497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9855 + ... + 11176.

It is an arithmetic number, because the mean of its divisors is an integer number (3480796).

Almost surely, 2^13901491 is an apocalyptic number.

13901491 is a deficient number, since it is larger than the sum of its proper divisors (21693).

13901491 is an equidigital number, since it uses as much as digits as its factorization.

13901491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21692.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 13901491 is about 3728.4703297733. The cubic root of 13901491 is about 240.4476079644.

The spelling of 13901491 in words is "thirteen million, nine hundred one thousand, four hundred ninety-one".