630141721 has 4 divisors (see below), whose sum is σ = 687427344. Its totient is φ = 572856100.

The previous prime is 630141713. The next prime is 630141749. The reversal of 630141721 is 127141036.

630141721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 630141721 - 2³ = 630141713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630141761) 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, 28642795 + ... + 28642816.

It is an arithmetic number, because the mean of its divisors is an integer number (171856836).

Almost surely, 2^630141721 is an apocalyptic number.

It is an amenable number.

630141721 is a deficient number, since it is larger than the sum of its proper divisors (57285623).

630141721 is a wasteful number, since it uses less digits than its factorization.

630141721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57285622.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 630141721 is about 25102.6237871662. The cubic root of 630141721 is about 857.3261648997.

Adding to 630141721 its reverse (127141036), we get a palindrome (757282757).

The spelling of 630141721 in words is "six hundred thirty million, one hundred forty-one thousand, seven hundred twenty-one".