797761 has 4 divisors (see below), whose sum is σ = 825300. Its totient is φ = 770224.

The previous prime is 797747. The next prime is 797767. The reversal of 797761 is 167797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167797 = 7 ⋅23971.

It can be written as a sum of positive squares in 2 ways, for example, as 197136 + 600625 = 444^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 797761 - 2⁵ = 797729 is a prime.

It is a super-2 number, since 2×797761² = 1272845226242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 797761.

It is not an unprimeable number, because it can be changed into a prime (797767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13726 + ... + 13783.

It is an arithmetic number, because the mean of its divisors is an integer number (206325).

2⁷⁹⁷⁷⁶¹ is an apocalyptic number.

It is an amenable number.

797761 is a deficient number, since it is larger than the sum of its proper divisors (27539).

797761 is a wasteful number, since it uses less digits than its factorization.

797761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27538.

The product of its digits is 18522, while the sum is 37.

The square root of 797761 is about 893.1746749657. The cubic root of 797761 is about 92.7450914401.

The spelling of 797761 in words is "seven hundred ninety-seven thousand, seven hundred sixty-one".