797120721 has 12 divisors (see below), whose sum is σ = 1160187600. Its totient is φ = 527356440.

The previous prime is 797120719. The next prime is 797120741. The reversal of 797120721 is 127021797.

It is not a de Polignac number, because 797120721 - 2¹ = 797120719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (797120741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336871 + ... + 339228.

It is an arithmetic number, because the mean of its divisors is an integer number (96682300).

Almost surely, 2^797120721 is an apocalyptic number.

It is an amenable number.

797120721 is a deficient number, since it is larger than the sum of its proper divisors (363066879).

797120721 is a wasteful number, since it uses less digits than its factorization.

797120721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676236 (or 676233 counting only the distinct ones).

The product of its (nonzero) digits is 12348, while the sum is 36.

The square root of 797120721 is about 28233.3264246351. The cubic root of 797120721 is about 927.2027254983.

The spelling of 797120721 in words is "seven hundred ninety-seven million, one hundred twenty thousand, seven hundred twenty-one".