631763749 has 2 divisors, whose sum is σ = 631763750. Its totient is φ = 631763748.

The previous prime is 631763729. The next prime is 631763771. The reversal of 631763749 is 947367136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620906724 + 10857025 = 24918^2 + 3295^2 .

It is a cyclic number.

It is not a de Polignac number, because 631763749 - 2⁷ = 631763621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631763699 and 631763708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631763729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315881874 + 315881875.

It is an arithmetic number, because the mean of its divisors is an integer number (315881875).

Almost surely, 2^631763749 is an apocalyptic number.

It is an amenable number.

631763749 is a deficient number, since it is larger than the sum of its proper divisors (1).

631763749 is an equidigital number, since it uses as much as digits as its factorization.

631763749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 46.

The square root of 631763749 is about 25134.9109606539. The cubic root of 631763749 is about 858.0611400801.

The spelling of 631763749 in words is "six hundred thirty-one million, seven hundred sixty-three thousand, seven hundred forty-nine".