1021797533 has 2 divisors, whose sum is σ = 1021797534. Its totient is φ = 1021797532.

The previous prime is 1021797499. The next prime is 1021797551. The reversal of 1021797533 is 3357971201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518154169 + 503643364 = 22763^2 + 22442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021797533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021797233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510898766 + 510898767.

It is an arithmetic number, because the mean of its divisors is an integer number (510898767).

Almost surely, 2^1021797533 is an apocalyptic number.

It is an amenable number.

1021797533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021797533 is an equidigital number, since it uses as much as digits as its factorization.

1021797533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 1021797533 is about 31965.5679286322. The cubic root of 1021797533 is about 1007.2136819987.

The spelling of 1021797533 in words is "one billion, twenty-one million, seven hundred ninety-seven thousand, five hundred thirty-three".