16890451 has 2 divisors, whose sum is σ = 16890452. Its totient is φ = 16890450.

The previous prime is 16890439. The next prime is 16890479. The reversal of 16890451 is 15409861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16890451 - 2⁷ = 16890323 is a prime.

It is not a weakly prime, because it can be changed into another prime (16890421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8445225 + 8445226.

It is an arithmetic number, because the mean of its divisors is an integer number (8445226).

Almost surely, 2^16890451 is an apocalyptic number.

16890451 is a deficient number, since it is larger than the sum of its proper divisors (1).

16890451 is an equidigital number, since it uses as much as digits as its factorization.

16890451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 16890451 is about 4109.7993868314. The cubic root of 16890451 is about 256.5746520865.

The spelling of 16890451 in words is "sixteen million, eight hundred ninety thousand, four hundred fifty-one".