1021922879 has 2 divisors, whose sum is σ = 1021922880. Its totient is φ = 1021922878.

The previous prime is 1021922807. The next prime is 1021922897. The reversal of 1021922879 is 9782291201.

Together with next prime (1021922897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (9782291201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021922879 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021952879) 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 as a sum of consecutive naturals, namely, 510961439 + 510961440.

It is an arithmetic number, because the mean of its divisors is an integer number (510961440).

Almost surely, 2^1021922879 is an apocalyptic number.

1021922879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021922879 is an equidigital number, since it uses as much as digits as its factorization.

1021922879 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 41.

The square root of 1021922879 is about 31967.5285094109. The cubic root of 1021922879 is about 1007.2548659711.

The spelling of 1021922879 in words is "one billion, twenty-one million, nine hundred twenty-two thousand, eight hundred seventy-nine".