13001399 has 4 divisors (see below), whose sum is σ = 13011264. Its totient is φ = 12991536.

The previous prime is 13001389. The next prime is 13001407. The reversal of 13001399 is 99310031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99310031 = 79 ⋅1257089.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13001399 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 (13001389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2582 + ... + 5715.

It is an arithmetic number, because the mean of its divisors is an integer number (3252816).

Almost surely, 2^13001399 is an apocalyptic number.

13001399 is a deficient number, since it is larger than the sum of its proper divisors (9865).

13001399 is an equidigital number, since it uses as much as digits as its factorization.

13001399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9864.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 13001399 is about 3605.7452766384. The cubic root of 13001399 is about 235.1419031291.

The spelling of 13001399 in words is "thirteen million, one thousand, three hundred ninety-nine".