823553 has 2 divisors, whose sum is σ = 823554. Its totient is φ = 823552.

The previous prime is 823547. The next prime is 823573. The reversal of 823553 is 355328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 795664 + 27889 = 892^2 + 167^2 .

It is a cyclic number.

It is not a de Polignac number, because 823553 - 2⁶ = 823489 is a prime.

It is not a weakly prime, because it can be changed into another prime (823573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411776 + 411777.

It is an arithmetic number, because the mean of its divisors is an integer number (411777).

2⁸²³⁵⁵³ is an apocalyptic number.

It is an amenable number.

823553 is a deficient number, since it is larger than the sum of its proper divisors (1).

823553 is an equidigital number, since it uses as much as digits as its factorization.

823553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 823553 is about 907.4982093646. The cubic root of 823553 is about 93.7340073461.

The spelling of 823553 in words is "eight hundred twenty-three thousand, five hundred fifty-three".