1022785849 has 4 divisors (see below), whose sum is σ = 1022852736. Its totient is φ = 1022718964.

The previous prime is 1022785823. The next prime is 1022785853. The reversal of 1022785849 is 9485872201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1022785849 - 2⁷ = 1022785721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022785799 and 1022785808.

It is not an unprimeable number, because it can be changed into a prime (1022785859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2052 + ... + 45274.

It is an arithmetic number, because the mean of its divisors is an integer number (255713184).

Almost surely, 2^1022785849 is an apocalyptic number.

It is an amenable number.

1022785849 is a deficient number, since it is larger than the sum of its proper divisors (66887).

1022785849 is an equidigital number, since it uses as much as digits as its factorization.

1022785849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66886.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 1022785849 is about 31981.0232638044. The cubic root of 1022785849 is about 1007.5383140304.

The spelling of 1022785849 in words is "one billion, twenty-two million, seven hundred eighty-five thousand, eight hundred forty-nine".