822793987 has 2 divisors, whose sum is σ = 822793988. Its totient is φ = 822793986.

The previous prime is 822793883. The next prime is 822793991. The reversal of 822793987 is 789397228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 822793987 - 2⁷ = 822793859 is a prime.

It is not a weakly prime, because it can be changed into another prime (822793997) 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, 411396993 + 411396994.

It is an arithmetic number, because the mean of its divisors is an integer number (411396994).

Almost surely, 2^822793987 is an apocalyptic number.

822793987 is a deficient number, since it is larger than the sum of its proper divisors (1).

822793987 is an equidigital number, since it uses as much as digits as its factorization.

822793987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 55.

The square root of 822793987 is about 28684.3857699620. The cubic root of 822793987 is about 937.0520240054.

The spelling of 822793987 in words is "eight hundred twenty-two million, seven hundred ninety-three thousand, nine hundred eighty-seven".