632990009 has 2 divisors, whose sum is σ = 632990010. Its totient is φ = 632990008.

The previous prime is 632989999. The next prime is 632990011. The reversal of 632990009 is 900099236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 625150009 + 7840000 = 25003^2 + 2800^2 .

It is a cyclic number.

It is not a de Polignac number, because 632990009 - 2⁴ = 632989993 is a prime.

Together with 632990011, it forms a pair of twin primes.

It is a Chen prime.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316495004 + 316495005.

It is an arithmetic number, because the mean of its divisors is an integer number (316495005).

Almost surely, 2^632990009 is an apocalyptic number.

It is an amenable number.

632990009 is a deficient number, since it is larger than the sum of its proper divisors (1).

632990009 is an equidigital number, since it uses as much as digits as its factorization.

632990009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 632990009 is about 25159.2926967353. The cubic root of 632990009 is about 858.6159498000.

The spelling of 632990009 in words is "six hundred thirty-two million, nine hundred ninety thousand, nine".