632690321 has 2 divisors, whose sum is σ = 632690322. Its totient is φ = 632690320.

The previous prime is 632690299. The next prime is 632690323. The reversal of 632690321 is 123096236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543123025 + 89567296 = 23305^2 + 9464^2 .

It is a cyclic number.

It is not a de Polignac number, because 632690321 - 2⁶ = 632690257 is a prime.

It is a Sophie Germain prime.

Together with 632690323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (632690323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316345160 + 316345161.

It is an arithmetic number, because the mean of its divisors is an integer number (316345161).

Almost surely, 2^632690321 is an apocalyptic number.

It is an amenable number.

632690321 is a deficient number, since it is larger than the sum of its proper divisors (1).

632690321 is an equidigital number, since it uses as much as digits as its factorization.

632690321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 632690321 is about 25153.3361803161. The cubic root of 632690321 is about 858.4804250089.

The spelling of 632690321 in words is "six hundred thirty-two million, six hundred ninety thousand, three hundred twenty-one".