630280613 has 4 divisors (see below), whose sum is σ = 638914668. Its totient is φ = 621646560.

The previous prime is 630280603. The next prime is 630280621. The reversal of 630280613 is 316082036.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 396129409 + 234151204 = 19903^2 + 15302^2 .

It is a cyclic number.

It is not a de Polignac number, because 630280613 - 2¹⁰ = 630279589 is a prime.

It is a super-2 number, since 2×630280613² = 794507302247311538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630280603) 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 in 3 ways as a sum of consecutive naturals, for example, 4316918 + ... + 4317063.

It is an arithmetic number, because the mean of its divisors is an integer number (159728667).

Almost surely, 2^630280613 is an apocalyptic number.

It is an amenable number.

630280613 is a deficient number, since it is larger than the sum of its proper divisors (8634055).

630280613 is an equidigital number, since it uses as much as digits as its factorization.

630280613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8634054.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 630280613 is about 25105.3901184586. The cubic root of 630280613 is about 857.3891491428.

The spelling of 630280613 in words is "six hundred thirty million, two hundred eighty thousand, six hundred thirteen".