13977257 has 4 divisors (see below), whose sum is σ = 15974016. Its totient is φ = 11980500.

The previous prime is 13977251. The next prime is 13977259. The reversal of 13977257 is 75277931.

13977257 is digitally balanced in base 2, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13977257 - 2²² = 9782953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13977251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998369 + ... + 998382.

It is an arithmetic number, because the mean of its divisors is an integer number (3993504).

Almost surely, 2^13977257 is an apocalyptic number.

It is an amenable number.

13977257 is a deficient number, since it is larger than the sum of its proper divisors (1996759).

13977257 is an equidigital number, since it uses as much as digits as its factorization.

13977257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996758.

The product of its digits is 92610, while the sum is 41.

The square root of 13977257 is about 3738.6169902786. The cubic root of 13977257 is about 240.8836464793.

The spelling of 13977257 in words is "thirteen million, nine hundred seventy-seven thousand, two hundred fifty-seven".