632085991 has 2 divisors, whose sum is σ = 632085992. Its totient is φ = 632085990.

The previous prime is 632085989. The next prime is 632086009. The reversal of 632085991 is 199580236.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 632085991 - 2¹ = 632085989 is a prime.

Together with 632085989, 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 (632085941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316042995 + 316042996.

It is an arithmetic number, because the mean of its divisors is an integer number (316042996).

Almost surely, 2^632085991 is an apocalyptic number.

632085991 is a deficient number, since it is larger than the sum of its proper divisors (1).

632085991 is an equidigital number, since it uses as much as digits as its factorization.

632085991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 632085991 is about 25141.3203909421. The cubic root of 632085991 is about 858.2070049122.

The spelling of 632085991 in words is "six hundred thirty-two million, eighty-five thousand, nine hundred ninety-one".