13490509 has 2 divisors, whose sum is σ = 13490510. Its totient is φ = 13490508.

The previous prime is 13490479. The next prime is 13490573. The reversal of 13490509 is 90509431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 21609 = 3670^2 + 147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13490509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13491509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6745254 + 6745255.

It is an arithmetic number, because the mean of its divisors is an integer number (6745255).

Almost surely, 2^13490509 is an apocalyptic number.

It is an amenable number.

13490509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13490509 is an equidigital number, since it uses as much as digits as its factorization.

13490509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 13490509 is about 3672.9428255828. The cubic root of 13490509 is about 238.0543446270.

The spelling of 13490509 in words is "thirteen million, four hundred ninety thousand, five hundred nine".