823940371 has 2 divisors, whose sum is σ = 823940372. Its totient is φ = 823940370.

The previous prime is 823940287. The next prime is 823940393. The reversal of 823940371 is 173049328.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 823940371 - 2⁹ = 823939859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 823940371.

It is not a weakly prime, because it can be changed into another prime (823940171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411970185 + 411970186.

It is an arithmetic number, because the mean of its divisors is an integer number (411970186).

Almost surely, 2^823940371 is an apocalyptic number.

823940371 is a deficient number, since it is larger than the sum of its proper divisors (1).

823940371 is an equidigital number, since it uses as much as digits as its factorization.

823940371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 823940371 is about 28704.3615327009. The cubic root of 823940371 is about 937.4870145994.

Adding to 823940371 its reverse (173049328), we get a palindrome (996989699).

The spelling of 823940371 in words is "eight hundred twenty-three million, nine hundred forty thousand, three hundred seventy-one".