13520839 has 2 divisors, whose sum is σ = 13520840. Its totient is φ = 13520838.

The previous prime is 13520827. The next prime is 13520851. The reversal of 13520839 is 93802531.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (13520827) and next prime (13520851).

It is a cyclic number.

It is not a de Polignac number, because 13520839 - 2⁵ = 13520807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13520839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13520809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760419 + 6760420.

It is an arithmetic number, because the mean of its divisors is an integer number (6760420).

Almost surely, 2^13520839 is an apocalyptic number.

13520839 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520839 is an equidigital number, since it uses as much as digits as its factorization.

13520839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 13520839 is about 3677.0693493596. The cubic root of 13520839 is about 238.2326127733.

The spelling of 13520839 in words is "thirteen million, five hundred twenty thousand, eight hundred thirty-nine".