15997000139 has 2 divisors, whose sum is σ = 15997000140. Its totient is φ = 15997000138.

The previous prime is 15997000127. The next prime is 15997000147. The reversal of 15997000139 is 93100079951.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15997000139 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15997000139.

It is not a weakly prime, because it can be changed into another prime (15997000169) 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, 7998500069 + 7998500070.

It is an arithmetic number, because the mean of its divisors is an integer number (7998500070).

Almost surely, 2^15997000139 is an apocalyptic number.

15997000139 is a deficient number, since it is larger than the sum of its proper divisors (1).

15997000139 is an equidigital number, since it uses as much as digits as its factorization.

15997000139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76545, while the sum is 44.

The spelling of 15997000139 in words is "fifteen billion, nine hundred ninety-seven million, one hundred thirty-nine", and thus it is an aban number.