13958399 has 16 divisors (see below), whose sum is σ = 17306688. Its totient is φ = 10962432.

The previous prime is 13958393. The next prime is 13958419. The reversal of 13958399 is 99385931.

It is not a de Polignac number, because 13958399 - 2⁴ = 13958383 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13958393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13799 + ... + 14775.

It is an arithmetic number, because the mean of its divisors is an integer number (1081668).

Almost surely, 2^13958399 is an apocalyptic number.

13958399 is a deficient number, since it is larger than the sum of its proper divisors (3348289).

13958399 is a wasteful number, since it uses less digits than its factorization.

13958399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its digits is 262440, while the sum is 47.

The square root of 13958399 is about 3736.0940833978. The cubic root of 13958399 is about 240.7752649784.

The spelling of 13958399 in words is "thirteen million, nine hundred fifty-eight thousand, three hundred ninety-nine".