16904663 has 2 divisors, whose sum is σ = 16904664. Its totient is φ = 16904662.

The previous prime is 16904611. The next prime is 16904711. The reversal of 16904663 is 36640961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16904663 - 2¹⁸ = 16642519 is a prime.

It is a super-2 number, since 2×16904663² = 571535262287138, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16904263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8452331 + 8452332.

It is an arithmetic number, because the mean of its divisors is an integer number (8452332).

Almost surely, 2^16904663 is an apocalyptic number.

16904663 is a deficient number, since it is larger than the sum of its proper divisors (1).

16904663 is an equidigital number, since it uses as much as digits as its factorization.

16904663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 16904663 is about 4111.5280614390. The cubic root of 16904663 is about 256.6465944461.

The spelling of 16904663 in words is "sixteen million, nine hundred four thousand, six hundred sixty-three".