1021310993 has 2 divisors, whose sum is σ = 1021310994. Its totient is φ = 1021310992.

The previous prime is 1021310981. The next prime is 1021311019. The reversal of 1021310993 is 3990131201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1020930304 + 380689 = 31952^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021310993 - 2⁸ = 1021310737 is a prime.

It is a super-2 number, since 2×1021310993² = 2086152288845292098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1021310923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510655496 + 510655497.

It is an arithmetic number, because the mean of its divisors is an integer number (510655497).

Almost surely, 2^1021310993 is an apocalyptic number.

It is an amenable number.

1021310993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021310993 is an equidigital number, since it uses as much as digits as its factorization.

1021310993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1021310993 is about 31957.9566461938. The cubic root of 1021310993 is about 1007.0537913712.

The spelling of 1021310993 in words is "one billion, twenty-one million, three hundred ten thousand, nine hundred ninety-three".