16913009 has 2 divisors, whose sum is σ = 16913010. Its totient is φ = 16913008.

The previous prime is 16912991. The next prime is 16913047. The reversal of 16913009 is 90031961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16834609 + 78400 = 4103^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 16913009 - 2¹⁶ = 16847473 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16913069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8456504 + 8456505.

It is an arithmetic number, because the mean of its divisors is an integer number (8456505).

Almost surely, 2^16913009 is an apocalyptic number.

It is an amenable number.

16913009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16913009 is an equidigital number, since it uses as much as digits as its factorization.

16913009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 16913009 is about 4112.5428873144. The cubic root of 16913009 is about 256.6888238213.

The spelling of 16913009 in words is "sixteen million, nine hundred thirteen thousand, nine".