630615481 has 2 divisors, whose sum is σ = 630615482. Its totient is φ = 630615480.

The previous prime is 630615439. The next prime is 630615509. The reversal of 630615481 is 184516036.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464618025 + 165997456 = 21555^2 + 12884^2 .

It is a cyclic number.

It is not a de Polignac number, because 630615481 - 2¹⁵ = 630582713 is a prime.

It is a super-2 number, since 2×630615481² = 795351769753722722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (630615281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315307740 + 315307741.

It is an arithmetic number, because the mean of its divisors is an integer number (315307741).

Almost surely, 2^630615481 is an apocalyptic number.

It is an amenable number.

630615481 is a deficient number, since it is larger than the sum of its proper divisors (1).

630615481 is an equidigital number, since it uses as much as digits as its factorization.

630615481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 630615481 is about 25112.0584779504. The cubic root of 630615481 is about 857.5409658369.

The spelling of 630615481 in words is "six hundred thirty million, six hundred fifteen thousand, four hundred eighty-one".