2797117721 has 8 divisors (see below), whose sum is σ = 2888732160. Its totient is φ = 2706840928.

The previous prime is 2797117717. The next prime is 2797117727. The reversal of 2797117721 is 1277117972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2797117721 - 2² = 2797117717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2797117727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330161 + ... + 338526.

It is an arithmetic number, because the mean of its divisors is an integer number (361091520).

Almost surely, 2^2797117721 is an apocalyptic number.

It is an amenable number.

2797117721 is a deficient number, since it is larger than the sum of its proper divisors (91614439).

2797117721 is an equidigital number, since it uses as much as digits as its factorization.

2797117721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668823.

The product of its digits is 86436, while the sum is 44.

The square root of 2797117721 is about 52887.7842322781. The cubic root of 2797117721 is about 1408.9759546308.

The spelling of 2797117721 in words is "two billion, seven hundred ninety-seven million, one hundred seventeen thousand, seven hundred twenty-one".