823533973 has 2 divisors, whose sum is σ = 823533974. Its totient is φ = 823533972.

The previous prime is 823533959. The next prime is 823534001. The reversal of 823533973 is 379335328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655001649 + 168532324 = 25593^2 + 12982^2 .

It is a cyclic number.

It is not a de Polignac number, because 823533973 - 2⁹ = 823533461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (823533173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411766986 + 411766987.

It is an arithmetic number, because the mean of its divisors is an integer number (411766987).

Almost surely, 2^823533973 is an apocalyptic number.

It is an amenable number.

823533973 is a deficient number, since it is larger than the sum of its proper divisors (1).

823533973 is an equidigital number, since it uses as much as digits as its factorization.

823533973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 43.

The square root of 823533973 is about 28697.2816308444. The cubic root of 823533973 is about 937.3328547766.

The spelling of 823533973 in words is "eight hundred twenty-three million, five hundred thirty-three thousand, nine hundred seventy-three".