15997000169 has 2 divisors, whose sum is σ = 15997000170. Its totient is φ = 15997000168.

The previous prime is 15997000147. The next prime is 15997000171. The reversal of 15997000169 is 96100079951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11708322025 + 4288678144 = 108205^2 + 65488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15997000169 is a prime.

It is a super-2 number, since 2×15997000169² (a number of 21 digits) contains 22 as substring.

Together with 15997000171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15997000139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7998500084 + 7998500085.

It is an arithmetic number, because the mean of its divisors is an integer number (7998500085).

Almost surely, 2^15997000169 is an apocalyptic number.

It is an amenable number.

15997000169 is a deficient number, since it is larger than the sum of its proper divisors (1).

15997000169 is an equidigital number, since it uses as much as digits as its factorization.

15997000169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153090, while the sum is 47.

The spelling of 15997000169 in words is "fifteen billion, nine hundred ninety-seven million, one hundred sixty-nine", and thus it is an aban number.