631662289 has 2 divisors, whose sum is σ = 631662290. Its totient is φ = 631662288.

The previous prime is 631662233. The next prime is 631662323. The reversal of 631662289 is 982266136.

631662289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541260225 + 90402064 = 23265^2 + 9508^2 .

It is a cyclic number.

It is not a de Polignac number, because 631662289 - 2²⁷ = 497444561 is a prime.

It is not a weakly prime, because it can be changed into another prime (631662209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315831144 + 315831145.

It is an arithmetic number, because the mean of its divisors is an integer number (315831145).

Almost surely, 2^631662289 is an apocalyptic number.

It is an amenable number.

631662289 is a deficient number, since it is larger than the sum of its proper divisors (1).

631662289 is an equidigital number, since it uses as much as digits as its factorization.

631662289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 631662289 is about 25132.8925712899. The cubic root of 631662289 is about 858.0152033175.

The spelling of 631662289 in words is "six hundred thirty-one million, six hundred sixty-two thousand, two hundred eighty-nine".