16497889 has 2 divisors, whose sum is σ = 16497890. Its totient is φ = 16497888.

The previous prime is 16497883. The next prime is 16497907. The reversal of 16497889 is 98879461.

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., 9659664 + 6838225 = 3108^2 + 2615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16497889 is a prime.

It is not a weakly prime, because it can be changed into another prime (16497883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8248944 + 8248945.

It is an arithmetic number, because the mean of its divisors is an integer number (8248945).

Almost surely, 2^16497889 is an apocalyptic number.

It is an amenable number.

16497889 is a deficient number, since it is larger than the sum of its proper divisors (1).

16497889 is an equidigital number, since it uses as much as digits as its factorization.

16497889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 52.

The square root of 16497889 is about 4061.7593478689. The cubic root of 16497889 is about 254.5713109905.

The spelling of 16497889 in words is "sixteen million, four hundred ninety-seven thousand, eight hundred eighty-nine".