630877789 has 2 divisors, whose sum is σ = 630877790. Its totient is φ = 630877788.

The previous prime is 630877763. The next prime is 630877801. The reversal of 630877789 is 987778036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430230564 + 200647225 = 20742^2 + 14165^2 .

It is a cyclic number.

It is not a de Polignac number, because 630877789 - 2¹¹ = 630875741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630877759) 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, 315438894 + 315438895.

It is an arithmetic number, because the mean of its divisors is an integer number (315438895).

Almost surely, 2^630877789 is an apocalyptic number.

It is an amenable number.

630877789 is a deficient number, since it is larger than the sum of its proper divisors (1).

630877789 is an equidigital number, since it uses as much as digits as its factorization.

630877789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3556224, while the sum is 55.

The square root of 630877789 is about 25117.2806848194. The cubic root of 630877789 is about 857.6598489922.

It can be divided in two parts, 63087 and 7789, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 630877789 in words is "six hundred thirty million, eight hundred seventy-seven thousand, seven hundred eighty-nine".