630920243 has 2 divisors, whose sum is σ = 630920244. Its totient is φ = 630920242.

The previous prime is 630920219. The next prime is 630920309. The reversal of 630920243 is 342029036.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 630920243 - 2⁶ = 630920179 is a prime.

It is not a weakly prime, because it can be changed into another prime (630920203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315460121 + 315460122.

It is an arithmetic number, because the mean of its divisors is an integer number (315460122).

Almost surely, 2^630920243 is an apocalyptic number.

630920243 is a deficient number, since it is larger than the sum of its proper divisors (1).

630920243 is an equidigital number, since it uses as much as digits as its factorization.

630920243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 630920243 is about 25118.1257859738. The cubic root of 630920243 is about 857.6790868833.

Adding to 630920243 its reverse (342029036), we get a palindrome (972949279).

The spelling of 630920243 in words is "six hundred thirty million, nine hundred twenty thousand, two hundred forty-three".