63630729 has 12 divisors (see below), whose sum is σ = 94153332. Its totient is φ = 41385600.

The previous prime is 63630691. The next prime is 63630751. The reversal of 63630729 is 92703636.

It can be written as a sum of positive squares in 2 ways, for example, as 19713600 + 43917129 = 4440^2 + 6627^2 .

It is not a de Polignac number, because 63630729 - 2¹⁹ = 63106441 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 63630693 and 63630702.

It is not an unprimeable number, because it can be changed into a prime (63620729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85852 + ... + 86589.

It is an arithmetic number, because the mean of its divisors is an integer number (7846111).

Almost surely, 2^63630729 is an apocalyptic number.

It is an amenable number.

63630729 is a deficient number, since it is larger than the sum of its proper divisors (30522603).

63630729 is a wasteful number, since it uses less digits than its factorization.

63630729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172488 (or 172485 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 36.

The square root of 63630729 is about 7976.8871748320. The cubic root of 63630729 is about 399.2292010432.

The spelling of 63630729 in words is "sixty-three million, six hundred thirty thousand, seven hundred twenty-nine".