13990057 has 4 divisors (see below), whose sum is σ = 14084100. Its totient is φ = 13896016.

The previous prime is 13990043. The next prime is 13990073. The reversal of 13990057 is 75009931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1058841 + 12931216 = 1029^2 + 3596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13990057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13990087) 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, 46798 + ... + 47095.

It is an arithmetic number, because the mean of its divisors is an integer number (3521025).

Almost surely, 2^13990057 is an apocalyptic number.

It is an amenable number.

13990057 is a deficient number, since it is larger than the sum of its proper divisors (94043).

13990057 is an equidigital number, since it uses as much as digits as its factorization.

13990057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94042.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 13990057 is about 3740.3284615124. The cubic root of 13990057 is about 240.9571556557.

Adding to 13990057 its reverse (75009931), we get a palindrome (88999988).

The spelling of 13990057 in words is "thirteen million, nine hundred ninety thousand, fifty-seven".