765997 has 4 divisors (see below), whose sum is σ = 779040. Its totient is φ = 752956.

The previous prime is 765991. The next prime is 766021. The reversal of 765997 is 799567.

765997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 799567 = 839 ⋅953.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-765997 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 (765991) 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, 6433 + ... + 6550.

It is an arithmetic number, because the mean of its divisors is an integer number (194760).

2⁷⁶⁵⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

765997 is a deficient number, since it is larger than the sum of its proper divisors (13043).

765997 is a wasteful number, since it uses less digits than its factorization.

765997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13042.

The product of its digits is 119070, while the sum is 43.

The square root of 765997 is about 875.2125456139. The cubic root of 765997 is about 91.4974568057.

The spelling of 765997 in words is "seven hundred sixty-five thousand, nine hundred ninety-seven".