11715947 has 4 divisors (see below), whose sum is σ = 12225360. Its totient is φ = 11206536.

The previous prime is 11715943. The next prime is 11715959. The reversal of 11715947 is 74951711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74951711 = 4703 ⋅15937.

It is a cyclic number.

It is not a de Polignac number, because 11715947 - 2² = 11715943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11715943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254672 + ... + 254717.

It is an arithmetic number, because the mean of its divisors is an integer number (3056340).

Almost surely, 2^11715947 is an apocalyptic number.

11715947 is a deficient number, since it is larger than the sum of its proper divisors (509413).

11715947 is an equidigital number, since it uses as much as digits as its factorization.

11715947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509412.

The product of its digits is 8820, while the sum is 35.

The square root of 11715947 is about 3422.8565555688. The cubic root of 11715947 is about 227.1219628323.

The spelling of 11715947 in words is "eleven million, seven hundred fifteen thousand, nine hundred forty-seven".