630198749 has 2 divisors, whose sum is σ = 630198750. Its totient is φ = 630198748.

The previous prime is 630198733. The next prime is 630198761. The reversal of 630198749 is 947891036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 629106724 + 1092025 = 25082^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 630198749 - 2⁴ = 630198733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630198719) 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, 315099374 + 315099375.

It is an arithmetic number, because the mean of its divisors is an integer number (315099375).

Almost surely, 2^630198749 is an apocalyptic number.

It is an amenable number.

630198749 is a deficient number, since it is larger than the sum of its proper divisors (1).

630198749 is an equidigital number, since it uses as much as digits as its factorization.

630198749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 630198749 is about 25103.7596586647. The cubic root of 630198749 is about 857.3520268712.

It can be divided in two parts, 6301987 and 49, that added together give a palindrome (6302036).

The spelling of 630198749 in words is "six hundred thirty million, one hundred ninety-eight thousand, seven hundred forty-nine".