1021996799 has 2 divisors, whose sum is σ = 1021996800. Its totient is φ = 1021996798.

The previous prime is 1021996793. The next prime is 1021996819. The reversal of 1021996799 is 9976991201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021996799 - 2¹² = 1021992703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021996799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021996793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510998399 + 510998400.

It is an arithmetic number, because the mean of its divisors is an integer number (510998400).

Almost surely, 2^1021996799 is an apocalyptic number.

1021996799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021996799 is an equidigital number, since it uses as much as digits as its factorization.

1021996799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 551124, while the sum is 53.

The square root of 1021996799 is about 31968.6846617123. The cubic root of 1021996799 is about 1007.2791517191.

The spelling of 1021996799 in words is "one billion, twenty-one million, nine hundred ninety-six thousand, seven hundred ninety-nine".