16500997 has 2 divisors, whose sum is σ = 16500998. Its totient is φ = 16500996.

The previous prime is 16500977. The next prime is 16501003. The reversal of 16500997 is 79900561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13293316 + 3207681 = 3646^2 + 1791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16500997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16500907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8250498 + 8250499.

It is an arithmetic number, because the mean of its divisors is an integer number (8250499).

Almost surely, 2^16500997 is an apocalyptic number.

It is an amenable number.

16500997 is a deficient number, since it is larger than the sum of its proper divisors (1).

16500997 is an equidigital number, since it uses as much as digits as its factorization.

16500997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 16500997 is about 4062.1419226807. The cubic root of 16500997 is about 254.5872960246.

The spelling of 16500997 in words is "sixteen million, five hundred thousand, nine hundred ninety-seven".