13799657 has 4 divisors (see below), whose sum is σ = 14136276. Its totient is φ = 13463040.

The previous prime is 13799651. The next prime is 13799659. The reversal of 13799657 is 75699731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75699731 = 2729 ⋅27739.

It can be written as a sum of positive squares in 2 ways, for example, as 2637376 + 11162281 = 1624^2 + 3341^2 .

It is a cyclic number.

It is not a de Polignac number, because 13799657 - 2⁶ = 13799593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13799651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168248 + ... + 168329.

It is an arithmetic number, because the mean of its divisors is an integer number (3534069).

Almost surely, 2^13799657 is an apocalyptic number.

It is an amenable number.

13799657 is a deficient number, since it is larger than the sum of its proper divisors (336619).

13799657 is an equidigital number, since it uses as much as digits as its factorization.

13799657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336618.

The product of its digits is 357210, while the sum is 47.

The square root of 13799657 is about 3714.7889576664. The cubic root of 13799657 is about 239.8590433871.

The spelling of 13799657 in words is "thirteen million, seven hundred ninety-nine thousand, six hundred fifty-seven".