13968257 has 4 divisors (see below), whose sum is σ = 13983060. Its totient is φ = 13953456.

The previous prime is 13968239. The next prime is 13968281. The reversal of 13968257 is 75286931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75286931 = 17 ⋅4428643.

It can be written as a sum of positive squares in 2 ways, for example, as 6105841 + 7862416 = 2471^2 + 2804^2 .

It is a cyclic number.

It is not a de Polignac number, because 13968257 - 2⁸ = 13968001 is a prime.

It is a super-2 number, since 2×13968257² = 390224407236098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13968217) 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, 5882 + ... + 7907.

It is an arithmetic number, because the mean of its divisors is an integer number (3495765).

Almost surely, 2^13968257 is an apocalyptic number.

It is an amenable number.

13968257 is a deficient number, since it is larger than the sum of its proper divisors (14803).

13968257 is a wasteful number, since it uses less digits than its factorization.

13968257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14802.

The product of its digits is 90720, while the sum is 41.

The square root of 13968257 is about 3737.4131428035. The cubic root of 13968257 is about 240.8319334643.

The spelling of 13968257 in words is "thirteen million, nine hundred sixty-eight thousand, two hundred fifty-seven".