772831 has 4 divisors (see below), whose sum is σ = 776952. Its totient is φ = 768712.

The previous prime is 772789. The next prime is 772843. The reversal of 772831 is 138277.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138277 = 53 ⋅2609.

It is a cyclic number.

It is not a de Polignac number, because 772831 - 2⁷ = 772703 is a prime.

It is a super-2 number, since 2×772831² = 1194535509122, which contains 22 as substring.

It is a Duffinian number.

772831 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 772831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772231) 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, 1765 + ... + 2158.

It is an arithmetic number, because the mean of its divisors is an integer number (194238).

2⁷⁷²⁸³¹ is an apocalyptic number.

772831 is a deficient number, since it is larger than the sum of its proper divisors (4121).

772831 is a wasteful number, since it uses less digits than its factorization.

772831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4120.

The product of its digits is 2352, while the sum is 28.

The square root of 772831 is about 879.1080707171. The cubic root of 772831 is about 91.7687560494.

It can be divided in two parts, 77283 and 1, that added together give a square (77284 = 278²).

The spelling of 772831 in words is "seven hundred seventy-two thousand, eight hundred thirty-one".