16918669 has 2 divisors, whose sum is σ = 16918670. Its totient is φ = 16918668.

The previous prime is 16918619. The next prime is 16918673. The reversal of 16918669 is 96681961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16892100 + 26569 = 4110^2 + 163^2 .

It is a cyclic number.

It is not a de Polignac number, because 16918669 - 2¹³ = 16910477 is a prime.

It is a super-2 number, since 2×16918669² = 572482721463122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16918619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8459334 + 8459335.

It is an arithmetic number, because the mean of its divisors is an integer number (8459335).

Almost surely, 2^16918669 is an apocalyptic number.

It is an amenable number.

16918669 is a deficient number, since it is larger than the sum of its proper divisors (1).

16918669 is an equidigital number, since it uses as much as digits as its factorization.

16918669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 46.

The square root of 16918669 is about 4113.2309684724. The cubic root of 16918669 is about 256.7174545774.

The spelling of 16918669 in words is "sixteen million, nine hundred eighteen thousand, six hundred sixty-nine".