16493999 has 2 divisors, whose sum is σ = 16494000. Its totient is φ = 16493998.

The previous prime is 16493941. The next prime is 16494017. The reversal of 16493999 is 99939461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16493999 is a 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 (16493299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8246999 + 8247000.

It is an arithmetic number, because the mean of its divisors is an integer number (8247000).

Almost surely, 2^16493999 is an apocalyptic number.

16493999 is a deficient number, since it is larger than the sum of its proper divisors (1).

16493999 is an equidigital number, since it uses as much as digits as its factorization.

16493999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472392, while the sum is 50.

The square root of 16493999 is about 4061.2804631052. The cubic root of 16493999 is about 254.5513011528.

The spelling of 16493999 in words is "sixteen million, four hundred ninety-three thousand, nine hundred ninety-nine".