630681829 has 4 divisors (see below), whose sum is σ = 635285484. Its totient is φ = 626078176.

The previous prime is 630681713. The next prime is 630681847. The reversal of 630681829 is 928186036.

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 221712100 + 408969729 = 14890^2 + 20223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630681829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630681899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2301622 + ... + 2301895.

It is an arithmetic number, because the mean of its divisors is an integer number (158821371).

Almost surely, 2^630681829 is an apocalyptic number.

It is an amenable number.

630681829 is a deficient number, since it is larger than the sum of its proper divisors (4603655).

630681829 is a wasteful number, since it uses less digits than its factorization.

630681829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603654.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 630681829 is about 25113.3794818619. The cubic root of 630681829 is about 857.5710391724.

The spelling of 630681829 in words is "six hundred thirty million, six hundred eighty-one thousand, eight hundred twenty-nine".