2717980721 has 8 divisors (see below), whose sum is σ = 2784297984. Its totient is φ = 2652365520.

The previous prime is 2717980711. The next prime is 2717980729. The reversal of 2717980721 is 1270897172.

It is a happy number.

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 2717980721 - 2²⁶ = 2650871857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2717980729) 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, 167675 + ... + 183168.

It is an arithmetic number, because the mean of its divisors is an integer number (348037248).

Almost surely, 2^2717980721 is an apocalyptic number.

It is an amenable number.

2717980721 is a deficient number, since it is larger than the sum of its proper divisors (66317263).

2717980721 is a wasteful number, since it uses less digits than its factorization.

2717980721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351031.

The product of its (nonzero) digits is 98784, while the sum is 44.

The square root of 2717980721 is about 52134.2566936559. The cubic root of 2717980721 is about 1395.5608919419.

The spelling of 2717980721 in words is "two billion, seven hundred seventeen million, nine hundred eighty thousand, seven hundred twenty-one".