772823 has 4 divisors (see below), whose sum is σ = 806448. Its totient is φ = 739200.

The previous prime is 772789. The next prime is 772843. The reversal of 772823 is 328277.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 772823 - 2⁸ = 772567 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16778 + ... + 16823.

It is an arithmetic number, because the mean of its divisors is an integer number (201612).

2⁷⁷²⁸²³ is an apocalyptic number.

772823 is a deficient number, since it is larger than the sum of its proper divisors (33625).

772823 is a wasteful number, since it uses less digits than its factorization.

772823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33624.

The product of its digits is 4704, while the sum is 29.

The square root of 772823 is about 879.1035206391. The cubic root of 772823 is about 91.7684393986.

The spelling of 772823 in words is "seven hundred seventy-two thousand, eight hundred twenty-three".