63091990933 has 2 divisors, whose sum is σ = 63091990934. Its totient is φ = 63091990932.

The previous prime is 63091990931. The next prime is 63091990987. The reversal of 63091990933 is 33909919036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57253961284 + 5838029649 = 239278^2 + 76407^2 .

It is a cyclic number.

It is not a de Polignac number, because 63091990933 - 2¹ = 63091990931 is a prime.

Together with 63091990931, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63091990931) 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, 31545995466 + 31545995467.

It is an arithmetic number, because the mean of its divisors is an integer number (31545995467).

Almost surely, 2^63091990933 is an apocalyptic number.

It is an amenable number.

63091990933 is a deficient number, since it is larger than the sum of its proper divisors (1).

63091990933 is an equidigital number, since it uses as much as digits as its factorization.

63091990933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1062882, while the sum is 52.

The spelling of 63091990933 in words is "sixty-three billion, ninety-one million, nine hundred ninety thousand, nine hundred thirty-three".