630278903 has 2 divisors, whose sum is σ = 630278904. Its totient is φ = 630278902.

The previous prime is 630278881. The next prime is 630278911. The reversal of 630278903 is 309872036.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 630278903 - 2⁶ = 630278839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630278603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315139451 + 315139452.

It is an arithmetic number, because the mean of its divisors is an integer number (315139452).

Almost surely, 2^630278903 is an apocalyptic number.

630278903 is a deficient number, since it is larger than the sum of its proper divisors (1).

630278903 is an equidigital number, since it uses as much as digits as its factorization.

630278903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 630278903 is about 25105.3560620040. The cubic root of 630278903 is about 857.3883737545.

The spelling of 630278903 in words is "six hundred thirty million, two hundred seventy-eight thousand, nine hundred three".