630668149 has 2 divisors, whose sum is σ = 630668150. Its totient is φ = 630668148.

The previous prime is 630668141. The next prime is 630668167. The reversal of 630668149 is 941866036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 546156900 + 84511249 = 23370^2 + 9193^2 .

It is a cyclic number.

It is not a de Polignac number, because 630668149 - 2³ = 630668141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630668141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315334074 + 315334075.

It is an arithmetic number, because the mean of its divisors is an integer number (315334075).

Almost surely, 2^630668149 is an apocalyptic number.

It is an amenable number.

630668149 is a deficient number, since it is larger than the sum of its proper divisors (1).

630668149 is an equidigital number, since it uses as much as digits as its factorization.

630668149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 630668149 is about 25113.1071156080. The cubic root of 630668149 is about 857.5648386573.

The spelling of 630668149 in words is "six hundred thirty million, six hundred sixty-eight thousand, one hundred forty-nine".