631328773 has 2 divisors, whose sum is σ = 631328774. Its totient is φ = 631328772.

The previous prime is 631328767. The next prime is 631328791. The reversal of 631328773 is 377823136.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426752964 + 204575809 = 20658^2 + 14303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631328773 is a prime.

It is equal to p_32872774 and since 631328773 and 32872774 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631320773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315664386 + 315664387.

It is an arithmetic number, because the mean of its divisors is an integer number (315664387).

Almost surely, 2^631328773 is an apocalyptic number.

It is an amenable number.

631328773 is a deficient number, since it is larger than the sum of its proper divisors (1).

631328773 is an equidigital number, since it uses as much as digits as its factorization.

631328773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 40.

The square root of 631328773 is about 25126.2566451909. The cubic root of 631328773 is about 857.8641668209.

The spelling of 631328773 in words is "six hundred thirty-one million, three hundred twenty-eight thousand, seven hundred seventy-three".