15956947 has 2 divisors, whose sum is σ = 15956948. Its totient is φ = 15956946.

The previous prime is 15956911. The next prime is 15956951. The reversal of 15956947 is 74965951.

It is a strong prime.

It is an emirp because it is prime and its reverse (74965951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15956947 - 2⁷ = 15956819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15956897 and 15956906.

It is not a weakly prime, because it can be changed into another prime (15956957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7978473 + 7978474.

It is an arithmetic number, because the mean of its divisors is an integer number (7978474).

Almost surely, 2^15956947 is an apocalyptic number.

15956947 is a deficient number, since it is larger than the sum of its proper divisors (1).

15956947 is an equidigital number, since it uses as much as digits as its factorization.

15956947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 46.

The square root of 15956947 is about 3994.6147498852. The cubic root of 15956947 is about 251.7579928675.

The spelling of 15956947 in words is "fifteen million, nine hundred fifty-six thousand, nine hundred forty-seven".