797921761 has 16 divisors (see below), whose sum is σ = 1008603904. Its totient is φ = 614257344.

The previous prime is 797921759. The next prime is 797921767. The reversal of 797921761 is 167129797.

It is a cyclic number.

It is not a de Polignac number, because 797921761 - 2¹ = 797921759 is a prime.

It is a super-2 number, since 2×797921761² = 1273358273354682242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (797921767) 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 15 ways as a sum of consecutive naturals, for example, 115125 + ... + 121858.

It is an arithmetic number, because the mean of its divisors is an integer number (63037744).

Almost surely, 2^797921761 is an apocalyptic number.

It is an amenable number.

797921761 is a deficient number, since it is larger than the sum of its proper divisors (210682143).

797921761 is a wasteful number, since it uses less digits than its factorization.

797921761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237040.

The product of its digits is 333396, while the sum is 49.

The square root of 797921761 is about 28247.5089344176. The cubic root of 797921761 is about 927.5132087152.

The spelling of 797921761 in words is "seven hundred ninety-seven million, nine hundred twenty-one thousand, seven hundred sixty-one".