16305997 has 2 divisors, whose sum is σ = 16305998. Its totient is φ = 16305996.

The previous prime is 16305979. The next prime is 16306001. The reversal of 16305997 is 79950361.

Together with previous prime (16305979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15163236 + 1142761 = 3894^2 + 1069^2 .

It is a cyclic number.

It is not a de Polignac number, because 16305997 - 2¹¹ = 16303949 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 (16305697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8152998 + 8152999.

It is an arithmetic number, because the mean of its divisors is an integer number (8152999).

Almost surely, 2^16305997 is an apocalyptic number.

It is an amenable number.

16305997 is a deficient number, since it is larger than the sum of its proper divisors (1).

16305997 is an equidigital number, since it uses as much as digits as its factorization.

16305997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 16305997 is about 4038.0684739118. The cubic root of 16305997 is about 253.5804604108.

The spelling of 16305997 in words is "sixteen million, three hundred five thousand, nine hundred ninety-seven".