797020721 has 24 divisors (see below), whose sum is σ = 987012000. Its totient is φ = 639866304.

The previous prime is 797020699. The next prime is 797020729. The reversal of 797020721 is 127020797.

It is not a de Polignac number, because 797020721 - 2⁶ = 797020657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (797020729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78050 + ... + 87668.

It is an arithmetic number, because the mean of its divisors is an integer number (41125500).

Almost surely, 2^797020721 is an apocalyptic number.

It is an amenable number.

797020721 is a deficient number, since it is larger than the sum of its proper divisors (189991279).

797020721 is a wasteful number, since it uses less digits than its factorization.

797020721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9741 (or 9734 counting only the distinct ones).

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 797020721 is about 28231.5554123396. Note that the first 3 decimals coincide. The cubic root of 797020721 is about 927.1639508821.

The spelling of 797020721 in words is "seven hundred ninety-seven million, twenty thousand, seven hundred twenty-one".