16412989 has 2 divisors, whose sum is σ = 16412990. Its totient is φ = 16412988.

The previous prime is 16412969. The next prime is 16412993. The reversal of 16412989 is 98921461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15327225 + 1085764 = 3915^2 + 1042^2 .

It is a cyclic number.

It is not a de Polignac number, because 16412989 - 2⁷ = 16412861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16412909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8206494 + 8206495.

It is an arithmetic number, because the mean of its divisors is an integer number (8206495).

Almost surely, 2^16412989 is an apocalyptic number.

It is an amenable number.

16412989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16412989 is an equidigital number, since it uses as much as digits as its factorization.

16412989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 16412989 is about 4051.2947313174. The cubic root of 16412989 is about 254.1338755272.

The spelling of 16412989 in words is "sixteen million, four hundred twelve thousand, nine hundred eighty-nine".