15996671 has 2 divisors, whose sum is σ = 15996672. Its totient is φ = 15996670.

The previous prime is 15996667. The next prime is 15996679. The reversal of 15996671 is 17669951.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15996671 - 2² = 15996667 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15996679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7998335 + 7998336.

It is an arithmetic number, because the mean of its divisors is an integer number (7998336).

Almost surely, 2^15996671 is an apocalyptic number.

15996671 is a deficient number, since it is larger than the sum of its proper divisors (1).

15996671 is an equidigital number, since it uses as much as digits as its factorization.

15996671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 44.

The square root of 15996671 is about 3999.5838533527. The cubic root of 15996671 is about 251.9667326119.

The spelling of 15996671 in words is "fifteen million, nine hundred ninety-six thousand, six hundred seventy-one".