13946399 has 4 divisors (see below), whose sum is σ = 14680440. Its totient is φ = 13212360.

The previous prime is 13946393. The next prime is 13946411. The reversal of 13946399 is 99364931.

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

It is a cyclic number.

It is not a de Polignac number, because 13946399 - 2⁸ = 13946143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13946393) 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, 366992 + ... + 367029.

It is an arithmetic number, because the mean of its divisors is an integer number (3670110).

Almost surely, 2^13946399 is an apocalyptic number.

13946399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13946399 is a deficient number, since it is larger than the sum of its proper divisors (734041).

13946399 is an equidigital number, since it uses as much as digits as its factorization.

13946399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734040.

The product of its digits is 157464, while the sum is 44.

The square root of 13946399 is about 3734.4877828157. The cubic root of 13946399 is about 240.7062472362.

The spelling of 13946399 in words is "thirteen million, nine hundred forty-six thousand, three hundred ninety-nine".