630681265 has 4 divisors (see below), whose sum is σ = 756817524. Its totient is φ = 504545008.

The previous prime is 630681239. The next prime is 630681313. The reversal of 630681265 is 562186036.

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 223771681 + 406909584 = 14959^2 + 20172^2 .

It is a cyclic number.

It is not a de Polignac number, because 630681265 - 2¹³ = 630673073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 63068122 + ... + 63068131.

It is an arithmetic number, because the mean of its divisors is an integer number (189204381).

Almost surely, 2^630681265 is an apocalyptic number.

It is an amenable number.

630681265 is a deficient number, since it is larger than the sum of its proper divisors (126136259).

630681265 is a wasteful number, since it uses less digits than its factorization.

630681265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126136258.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 630681265 is about 25113.3682527852. The cubic root of 630681265 is about 857.5707835389.

It can be divided in two parts, 6306 and 81265, that added together give a triangular number (87571 = T₄₁₈).

The spelling of 630681265 in words is "six hundred thirty million, six hundred eighty-one thousand, two hundred sixty-five".