630021613 has 8 divisors (see below), whose sum is σ = 680992256. Its totient is φ = 579409200.

The previous prime is 630021559. The next prime is 630021643. The reversal of 630021613 is 316120036.

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-630021613 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 (630021643) 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, 85893 + ... + 92938.

It is an arithmetic number, because the mean of its divisors is an integer number (85124032).

Almost surely, 2^630021613 is an apocalyptic number.

It is an amenable number.

630021613 is a deficient number, since it is larger than the sum of its proper divisors (50970643).

630021613 is a wasteful number, since it uses less digits than its factorization.

630021613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179115.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 630021613 is about 25100.2313335953. The cubic root of 630021613 is about 857.2716912945.

Adding to 630021613 its reverse (316120036), we get a palindrome (946141649).

The spelling of 630021613 in words is "six hundred thirty million, twenty-one thousand, six hundred thirteen".