16994491 has 2 divisors, whose sum is σ = 16994492. Its totient is φ = 16994490.

The previous prime is 16994449. The next prime is 16994501. The reversal of 16994491 is 19449961.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16994491 - 2⁷ = 16994363 is a prime.

It is not a weakly prime, because it can be changed into another prime (16994191) 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, 8497245 + 8497246.

It is an arithmetic number, because the mean of its divisors is an integer number (8497246).

Almost surely, 2^16994491 is an apocalyptic number.

16994491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16994491 is an equidigital number, since it uses as much as digits as its factorization.

16994491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 16994491 is about 4122.4375071067. The cubic root of 16994491 is about 257.1003811821.

The spelling of 16994491 in words is "sixteen million, nine hundred ninety-four thousand, four hundred ninety-one".