1997633933 has 2 divisors, whose sum is σ = 1997633934. Its totient is φ = 1997633932.

The previous prime is 1997633887. The next prime is 1997633987. The reversal of 1997633933 is 3393367991.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1512665449 + 484968484 = 38893^2 + 22022^2 .

It is a cyclic number.

It is not a de Polignac number, because 1997633933 - 2¹⁰ = 1997632909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1997633233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998816966 + 998816967.

It is an arithmetic number, because the mean of its divisors is an integer number (998816967).

Almost surely, 2^1997633933 is an apocalyptic number.

It is an amenable number.

1997633933 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997633933 is an equidigital number, since it uses as much as digits as its factorization.

1997633933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2480058, while the sum is 53.

The square root of 1997633933 is about 44694.8982882834. The cubic root of 1997633933 is about 1259.4240109023.

The spelling of 1997633933 in words is "one billion, nine hundred ninety-seven million, six hundred thirty-three thousand, nine hundred thirty-three".