630623771 has 2 divisors, whose sum is σ = 630623772. Its totient is φ = 630623770.

The previous prime is 630623759. The next prime is 630623779. The reversal of 630623771 is 177326036.

It is a happy number.

630623771 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630623771 is a prime.

It is equal to p_32838056 and since 630623771 and 32838056 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (630623779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315311885 + 315311886.

It is an arithmetic number, because the mean of its divisors is an integer number (315311886).

Almost surely, 2^630623771 is an apocalyptic number.

630623771 is a deficient number, since it is larger than the sum of its proper divisors (1).

630623771 is an equidigital number, since it uses as much as digits as its factorization.

630623771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 630623771 is about 25112.2235375524. The cubic root of 630623771 is about 857.5447235327.

The spelling of 630623771 in words is "six hundred thirty million, six hundred twenty-three thousand, seven hundred seventy-one".