16953509 has 2 divisors, whose sum is σ = 16953510. Its totient is φ = 16953508.

The previous prime is 16953499. The next prime is 16953527. The reversal of 16953509 is 90535961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16785409 + 168100 = 4097^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 16953509 - 2⁴ = 16953493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16953569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8476754 + 8476755.

It is an arithmetic number, because the mean of its divisors is an integer number (8476755).

Almost surely, 2^16953509 is an apocalyptic number.

It is an amenable number.

16953509 is a deficient number, since it is larger than the sum of its proper divisors (1).

16953509 is an equidigital number, since it uses as much as digits as its factorization.

16953509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 16953509 is about 4117.4639039098. The cubic root of 16953509 is about 256.8935500641.

The spelling of 16953509 in words is "sixteen million, nine hundred fifty-three thousand, five hundred nine".