16499897 has 2 divisors, whose sum is σ = 16499898. Its totient is φ = 16499896.

The previous prime is 16499887. The next prime is 16499929. The reversal of 16499897 is 79899461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13623481 + 2876416 = 3691^2 + 1696^2 .

It is a cyclic number.

It is not a de Polignac number, because 16499897 - 2⁸ = 16499641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16499807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8249948 + 8249949.

It is an arithmetic number, because the mean of its divisors is an integer number (8249949).

Almost surely, 2^16499897 is an apocalyptic number.

It is an amenable number.

16499897 is a deficient number, since it is larger than the sum of its proper divisors (1).

16499897 is an equidigital number, since it uses as much as digits as its factorization.

16499897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 16499897 is about 4062.0065238746. The cubic root of 16499897 is about 254.5816387452.

Subtracting from 16499897 its sum of digits (53), we obtain a square (16499844 = 4062²).

The spelling of 16499897 in words is "sixteen million, four hundred ninety-nine thousand, eight hundred ninety-seven".