13994457 has 4 divisors (see below), whose sum is σ = 18659280. Its totient is φ = 9329636.

The previous prime is 13994447. The next prime is 13994483. The reversal of 13994457 is 75449931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13994457 - 2⁷ = 13994329 is a prime.

It is a plaindrome in base 15.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (13994447) 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, 2332407 + ... + 2332412.

It is an arithmetic number, because the mean of its divisors is an integer number (4664820).

Almost surely, 2^13994457 is an apocalyptic number.

It is an amenable number.

13994457 is a deficient number, since it is larger than the sum of its proper divisors (4664823).

13994457 is an equidigital number, since it uses as much as digits as its factorization.

13994457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664822.

The product of its digits is 136080, while the sum is 42.

The square root of 13994457 is about 3740.9165989100. The cubic root of 13994457 is about 240.9824140792.

The spelling of 13994457 in words is "thirteen million, nine hundred ninety-four thousand, four hundred fifty-seven".