823573 has 2 divisors, whose sum is σ = 823574. Its totient is φ = 823572.

The previous prime is 823553. The next prime is 823591. The reversal of 823573 is 375328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 669124 + 154449 = 818^2 + 393^2 .

It is a cyclic number.

It is not a de Polignac number, because 823573 - 2⁵ = 823541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (823553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411786 + 411787.

It is an arithmetic number, because the mean of its divisors is an integer number (411787).

2⁸²³⁵⁷³ is an apocalyptic number.

It is an amenable number.

823573 is a deficient number, since it is larger than the sum of its proper divisors (1).

823573 is an equidigital number, since it uses as much as digits as its factorization.

823573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 823573 is about 907.5092286032. The cubic root of 823573 is about 93.7347661173.

It can be divided in two parts, 82 and 3573, that added together give a triangular number (3655 = T₈₅).

The spelling of 823573 in words is "eight hundred twenty-three thousand, five hundred seventy-three".