15696691 has 2 divisors, whose sum is σ = 15696692. Its totient is φ = 15696690.

The previous prime is 15696673. The next prime is 15696697. The reversal of 15696691 is 19669651.

It is a strong prime.

It is an emirp because it is prime and its reverse (19669651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15696691 - 2⁹ = 15696179 is a prime.

It is a super-2 number, since 2×15696691² = 492772216698962, which contains 22 as substring.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is not a weakly prime, because it can be changed into another prime (15696697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7848345 + 7848346.

It is an arithmetic number, because the mean of its divisors is an integer number (7848346).

Almost surely, 2^15696691 is an apocalyptic number.

15696691 is a deficient number, since it is larger than the sum of its proper divisors (1).

15696691 is an equidigital number, since it uses as much as digits as its factorization.

15696691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 43.

The square root of 15696691 is about 3961.9049710966. The cubic root of 15696691 is about 250.3817687138.

The spelling of 15696691 in words is "fifteen million, six hundred ninety-six thousand, six hundred ninety-one".