15996971 has 2 divisors, whose sum is σ = 15996972. Its totient is φ = 15996970.

The previous prime is 15996943. The next prime is 15996997. The reversal of 15996971 is 17969951.

It is a strong prime.

It is an emirp because it is prime and its reverse (17969951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15996971 - 2¹⁸ = 15734827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15996941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7998485 + 7998486.

It is an arithmetic number, because the mean of its divisors is an integer number (7998486).

Almost surely, 2^15996971 is an apocalyptic number.

15996971 is a deficient number, since it is larger than the sum of its proper divisors (1).

15996971 is an equidigital number, since it uses as much as digits as its factorization.

15996971 is an odious number, because the sum of its binary digits is odd.

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

The square root of 15996971 is about 3999.6213570787. The cubic root of 15996971 is about 251.9683077218.

The spelling of 15996971 in words is "fifteen million, nine hundred ninety-six thousand, nine hundred seventy-one".