630010721 has 8 divisors (see below), whose sum is σ = 664330080. Its totient is φ = 595807488.

The previous prime is 630010709. The next prime is 630010723. The reversal of 630010721 is 127010036.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630010721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 630010693 and 630010702.

It is not an unprimeable number, because it can be changed into a prime (630010723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17771 + ... + 39696.

It is an arithmetic number, because the mean of its divisors is an integer number (83041260).

Almost surely, 2^630010721 is an apocalyptic number.

It is an amenable number.

630010721 is a deficient number, since it is larger than the sum of its proper divisors (34319359).

630010721 is a wasteful number, since it uses less digits than its factorization.

630010721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58063.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 630010721 is about 25100.0143625457. The cubic root of 630010721 is about 857.2667510105.

Adding to 630010721 its reverse (127010036), we get a palindrome (757020757).

The spelling of 630010721 in words is "six hundred thirty million, ten thousand, seven hundred twenty-one".