797765 has 4 divisors (see below), whose sum is σ = 957324. Its totient is φ = 638208.

The previous prime is 797747. The next prime is 797767. The reversal of 797765 is 567797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567797 = 181 ⋅3137.

It can be written as a sum of positive squares in 2 ways, for example, as 386884 + 410881 = 622^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 797765 - 2⁶ = 797701 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79772 + ... + 79781.

It is an arithmetic number, because the mean of its divisors is an integer number (239331).

2⁷⁹⁷⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

797765 is a deficient number, since it is larger than the sum of its proper divisors (159559).

797765 is a wasteful number, since it uses less digits than its factorization.

797765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159558.

The product of its digits is 92610, while the sum is 41.

The square root of 797765 is about 893.1769141665. The cubic root of 797765 is about 92.7452464489.

The spelling of 797765 in words is "seven hundred ninety-seven thousand, seven hundred sixty-five".