13120399 has 4 divisors (see below), whose sum is σ = 13286560. Its totient is φ = 12954240.

The previous prime is 13120351. The next prime is 13120411. The reversal of 13120399 is 99302131.

13120399 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 an emirpimes, since its reverse is a distinct semiprime: 99302131 = 79 ⋅1256989.

It is a cyclic number.

It is not a de Polignac number, because 13120399 - 2⁷ = 13120271 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 (13120339) 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, 82962 + ... + 83119.

It is an arithmetic number, because the mean of its divisors is an integer number (3321640).

Almost surely, 2^13120399 is an apocalyptic number.

13120399 is a deficient number, since it is larger than the sum of its proper divisors (166161).

13120399 is an equidigital number, since it uses as much as digits as its factorization.

13120399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166160.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 13120399 is about 3622.2091325599. The cubic root of 13120399 is about 235.8571324801.

The spelling of 13120399 in words is "thirteen million, one hundred twenty thousand, three hundred ninety-nine".