630236977 has 2 divisors, whose sum is σ = 630236978. Its totient is φ = 630236976.

The previous prime is 630236941. The next prime is 630236987. The reversal of 630236977 is 779632036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464445601 + 165791376 = 21551^2 + 12876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630236977 is a prime.

It is not a weakly prime, because it can be changed into another prime (630236917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315118488 + 315118489.

It is an arithmetic number, because the mean of its divisors is an integer number (315118489).

Almost surely, 2^630236977 is an apocalyptic number.

It is an amenable number.

630236977 is a deficient number, since it is larger than the sum of its proper divisors (1).

630236977 is an equidigital number, since it uses as much as digits as its factorization.

630236977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 43.

The square root of 630236977 is about 25104.5210470146. The cubic root of 630236977 is about 857.3693622439.

The spelling of 630236977 in words is "six hundred thirty million, two hundred thirty-six thousand, nine hundred seventy-seven".