13516409 has 2 divisors, whose sum is σ = 13516410. Its totient is φ = 13516408.

The previous prime is 13516397. The next prime is 13516417. The reversal of 13516409 is 90461531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13162384 + 354025 = 3628^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 13516409 - 2¹² = 13512313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13516439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6758204 + 6758205.

It is an arithmetic number, because the mean of its divisors is an integer number (6758205).

Almost surely, 2^13516409 is an apocalyptic number.

It is an amenable number.

13516409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13516409 is an equidigital number, since it uses as much as digits as its factorization.

13516409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 13516409 is about 3676.4669181158. The cubic root of 13516409 is about 238.2065915637.

The spelling of 13516409 in words is "thirteen million, five hundred sixteen thousand, four hundred nine".