13021399 has 2 divisors, whose sum is σ = 13021400. Its totient is φ = 13021398.

The previous prime is 13021391. The next prime is 13021429. The reversal of 13021399 is 99312031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13021399 - 2³ = 13021391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13021391) 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 as a sum of consecutive naturals, namely, 6510699 + 6510700.

It is an arithmetic number, because the mean of its divisors is an integer number (6510700).

Almost surely, 2^13021399 is an apocalyptic number.

13021399 is a deficient number, since it is larger than the sum of its proper divisors (1).

13021399 is an equidigital number, since it uses as much as digits as its factorization.

13021399 is an odious number, because the sum of its binary digits is odd.

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

The square root of 13021399 is about 3608.5175626564. The cubic root of 13021399 is about 235.2624139723.

It can be divided in two parts, 1302 and 1399, that added together give a triangular number (2701 = T₇₃).

The spelling of 13021399 in words is "thirteen million, twenty-one thousand, three hundred ninety-nine".