13513439 has 2 divisors, whose sum is σ = 13513440. Its totient is φ = 13513438.

The previous prime is 13513433. The next prime is 13513459. The reversal of 13513439 is 93431531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13513439 - 2¹² = 13509343 is a prime.

It is a super-2 number, since 2×13513439² = 365226067213442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13513433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6756719 + 6756720.

It is an arithmetic number, because the mean of its divisors is an integer number (6756720).

Almost surely, 2^13513439 is an apocalyptic number.

13513439 is a deficient number, since it is larger than the sum of its proper divisors (1).

13513439 is an equidigital number, since it uses as much as digits as its factorization.

13513439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 29.

The square root of 13513439 is about 3676.0629755215. The cubic root of 13513439 is about 238.1891430091.

The spelling of 13513439 in words is "thirteen million, five hundred thirteen thousand, four hundred thirty-nine".