630248831 has 4 divisors (see below), whose sum is σ = 630423912. Its totient is φ = 630073752.

The previous prime is 630248819. The next prime is 630248849. The reversal of 630248831 is 138842036.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630248831 is a prime.

It is a super-2 number, since 2×630248831² = 794427177953733122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 630248791 and 630248800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630242831) 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 in 3 ways as a sum of consecutive naturals, for example, 82025 + ... + 89378.

It is an arithmetic number, because the mean of its divisors is an integer number (157605978).

Almost surely, 2^630248831 is an apocalyptic number.

630248831 is a deficient number, since it is larger than the sum of its proper divisors (175081).

630248831 is a wasteful number, since it uses less digits than its factorization.

630248831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175080.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 630248831 is about 25104.7571388373. The cubic root of 630248831 is about 857.3747375726.

The spelling of 630248831 in words is "six hundred thirty million, two hundred forty-eight thousand, eight hundred thirty-one".