2296917721 has 4 divisors (see below), whose sum is σ = 2625048832. Its totient is φ = 1968786612.

The previous prime is 2296917691. The next prime is 2296917737. The reversal of 2296917721 is 1277196922.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2296917721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2296947721) 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, 164065545 + ... + 164065558.

It is an arithmetic number, because the mean of its divisors is an integer number (656262208).

Almost surely, 2^2296917721 is an apocalyptic number.

It is an amenable number.

2296917721 is a deficient number, since it is larger than the sum of its proper divisors (328131111).

2296917721 is an equidigital number, since it uses as much as digits as its factorization.

2296917721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328131110.

The product of its digits is 190512, while the sum is 46.

The square root of 2296917721 is about 47926.1694797321. The cubic root of 2296917721 is about 1319.4162020875.

The spelling of 2296917721 in words is "two billion, two hundred ninety-six million, nine hundred seventeen thousand, seven hundred twenty-one".