630717389 has 4 divisors (see below), whose sum is σ = 630826080. Its totient is φ = 630608700.

The previous prime is 630717383. The next prime is 630717397. The reversal of 630717389 is 983717036.

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 a de Polignac number, because none of the positive numbers 2^k-630717389 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 (630717383) 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, 45119 + ... + 57420.

It is an arithmetic number, because the mean of its divisors is an integer number (157706520).

Almost surely, 2^630717389 is an apocalyptic number.

It is an amenable number.

630717389 is a deficient number, since it is larger than the sum of its proper divisors (108691).

630717389 is a wasteful number, since it uses less digits than its factorization.

630717389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108690.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 630717389 is about 25114.0874610247. The cubic root of 630717389 is about 857.5871564662.

The spelling of 630717389 in words is "six hundred thirty million, seven hundred seventeen thousand, three hundred eighty-nine".