630639337 has 2 divisors, whose sum is σ = 630639338. Its totient is φ = 630639336.

The previous prime is 630639329. The next prime is 630639343. The reversal of 630639337 is 733936036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 367258896 + 263380441 = 19164^2 + 16229^2 .

It is a cyclic number.

It is not a de Polignac number, because 630639337 - 2³ = 630639329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 630639337.

It is not a weakly prime, because it can be changed into another prime (630639397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315319668 + 315319669.

It is an arithmetic number, because the mean of its divisors is an integer number (315319669).

Almost surely, 2^630639337 is an apocalyptic number.

It is an amenable number.

630639337 is a deficient number, since it is larger than the sum of its proper divisors (1).

630639337 is an equidigital number, since it uses as much as digits as its factorization.

630639337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 40.

The square root of 630639337 is about 25112.5334643879. The cubic root of 630639337 is about 857.5517792089.

The spelling of 630639337 in words is "six hundred thirty million, six hundred thirty-nine thousand, three hundred thirty-seven".