823942793 has 2 divisors, whose sum is σ = 823942794. Its totient is φ = 823942792.

The previous prime is 823942747. The next prime is 823942813. The reversal of 823942793 is 397249328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 634384969 + 189557824 = 25187^2 + 13768^2 .

It is a cyclic number.

It is not a de Polignac number, because 823942793 - 2¹² = 823938697 is a prime.

It is a super-2 number, since 2×823942793² = 1357763452273281698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (823942193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411971396 + 411971397.

It is an arithmetic number, because the mean of its divisors is an integer number (411971397).

Almost surely, 2^823942793 is an apocalyptic number.

It is an amenable number.

823942793 is a deficient number, since it is larger than the sum of its proper divisors (1).

823942793 is an equidigital number, since it uses as much as digits as its factorization.

823942793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The square root of 823942793 is about 28704.4037213805. The cubic root of 823942793 is about 937.4879331899.

The spelling of 823942793 in words is "eight hundred twenty-three million, nine hundred forty-two thousand, seven hundred ninety-three".