16504513 has 2 divisors, whose sum is σ = 16504514. Its totient is φ = 16504512.

The previous prime is 16504507. The next prime is 16504517. The reversal of 16504513 is 31540561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15186609 + 1317904 = 3897^2 + 1148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16504513 is a prime.

It is not a weakly prime, because it can be changed into another prime (16504517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252256 + 8252257.

It is an arithmetic number, because the mean of its divisors is an integer number (8252257).

Almost surely, 2^16504513 is an apocalyptic number.

It is an amenable number.

16504513 is a deficient number, since it is larger than the sum of its proper divisors (1).

16504513 is an equidigital number, since it uses as much as digits as its factorization.

16504513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 16504513 is about 4062.5746762367. The cubic root of 16504513 is about 254.6053770606.

The spelling of 16504513 in words is "sixteen million, five hundred four thousand, five hundred thirteen".