823819573 has 2 divisors, whose sum is σ = 823819574. Its totient is φ = 823819572.

The previous prime is 823819561. The next prime is 823819627. The reversal of 823819573 is 375918328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 420332004 + 403487569 = 20502^2 + 20087^2 .

It is a cyclic number.

It is not a de Polignac number, because 823819573 - 2²⁵ = 790265141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (823819553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411909786 + 411909787.

It is an arithmetic number, because the mean of its divisors is an integer number (411909787).

Almost surely, 2^823819573 is an apocalyptic number.

It is an amenable number.

823819573 is a deficient number, since it is larger than the sum of its proper divisors (1).

823819573 is an equidigital number, since it uses as much as digits as its factorization.

823819573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 823819573 is about 28702.2572805694. The cubic root of 823819573 is about 937.4411973311.

The spelling of 823819573 in words is "eight hundred twenty-three million, eight hundred nineteen thousand, five hundred seventy-three".