113216947 has 4 divisors (see below), whose sum is σ = 113434776. Its totient is φ = 112999120.

The previous prime is 113216921. The next prime is 113216977. The reversal of 113216947 is 749612311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749612311 = 7 ⋅107087473.

It is a cyclic number.

It is not a de Polignac number, because 113216947 - 2⁷ = 113216819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113216977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108133 + ... + 109174.

It is an arithmetic number, because the mean of its divisors is an integer number (28358694).

Almost surely, 2^113216947 is an apocalyptic number.

113216947 is a deficient number, since it is larger than the sum of its proper divisors (217829).

113216947 is an equidigital number, since it uses as much as digits as its factorization.

113216947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217828.

The product of its digits is 9072, while the sum is 34.

The square root of 113216947 is about 10640.3452481581. The cubic root of 113216947 is about 483.7680100215.

The spelling of 113216947 in words is "one hundred thirteen million, two hundred sixteen thousand, nine hundred forty-seven".