797721 has 8 divisors (see below), whose sum is σ = 1071840. Its totient is φ = 527712.

The previous prime is 797711. The next prime is 797729. The reversal of 797721 is 127797.

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

It is not a de Polignac number, because 797721 - 2⁵ = 797689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (797729) 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, 540 + ... + 1373.

It is an arithmetic number, because the mean of its divisors is an integer number (133980).

2⁷⁹⁷⁷²¹ is an apocalyptic number.

It is an amenable number.

797721 is a deficient number, since it is larger than the sum of its proper divisors (274119).

797721 is a wasteful number, since it uses less digits than its factorization.

797721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055.

The product of its digits is 6174, while the sum is 33.

The square root of 797721 is about 893.1522826484. The cubic root of 797721 is about 92.7435413244.

The spelling of 797721 in words is "seven hundred ninety-seven thousand, seven hundred twenty-one".