15997000609 has 2 divisors, whose sum is σ = 15997000610. Its totient is φ = 15997000608.

The previous prime is 15997000589. The next prime is 15997000703. The reversal of 15997000609 is 90600079951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8067632400 + 7929368209 = 89820^2 + 89047^2 .

It is a cyclic number.

It is not a de Polignac number, because 15997000609 - 2²⁹ = 15460129697 is a prime.

It is not a weakly prime, because it can be changed into another prime (15997001609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7998500304 + 7998500305.

It is an arithmetic number, because the mean of its divisors is an integer number (7998500305).

Almost surely, 2^15997000609 is an apocalyptic number.

It is an amenable number.

15997000609 is a deficient number, since it is larger than the sum of its proper divisors (1).

15997000609 is an equidigital number, since it uses as much as digits as its factorization.

15997000609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 46.

The spelling of 15997000609 in words is "fifteen billion, nine hundred ninety-seven million, six hundred nine", and thus it is an aban number.