631263133309 has 2 divisors, whose sum is σ = 631263133310. Its totient is φ = 631263133308.

The previous prime is 631263133307. The next prime is 631263133327. The reversal of 631263133309 is 903331362136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630936319225 + 326814084 = 794315^2 + 18078^2 .

It is a cyclic number.

It is not a de Polignac number, because 631263133309 - 2¹ = 631263133307 is a prime.

Together with 631263133307, 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 (631263133307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315631566654 + 315631566655.

It is an arithmetic number, because the mean of its divisors is an integer number (315631566655).

Almost surely, 2^631263133309 is an apocalyptic number.

It is an amenable number.

631263133309 is a deficient number, since it is larger than the sum of its proper divisors (1).

631263133309 is an equidigital number, since it uses as much as digits as its factorization.

631263133309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 40.

The spelling of 631263133309 in words is "six hundred thirty-one billion, two hundred sixty-three million, one hundred thirty-three thousand, three hundred nine".