797921656 has 32 divisors (see below), whose sum is σ = 1810412640. Its totient is φ = 321850368.

The previous prime is 797921653. The next prime is 797921659. The reversal of 797921656 is 656129797.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (797921653) and next prime (797921659).

It is a super-2 number, since 2×797921656² = 1273357938227564672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797921653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418125 + ... + 420028.

It is an arithmetic number, because the mean of its divisors is an integer number (56575395).

Almost surely, 2^797921656 is an apocalyptic number.

It is an amenable number.

797921656 is an abundant number, since it is smaller than the sum of its proper divisors (1012490984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

797921656 is a wasteful number, since it uses less digits than its factorization.

797921656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838183 (or 838179 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 52.

The square root of 797921656 is about 28247.5070758465. The cubic root of 797921656 is about 927.5131680309.

The spelling of 797921656 in words is "seven hundred ninety-seven million, nine hundred twenty-one thousand, six hundred fifty-six".