630393905 has 8 divisors (see below), whose sum is σ = 759350592. Its totient is φ = 502396528.

The previous prime is 630393857. The next prime is 630393919. The reversal of 630393905 is 509393036.

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

It is a cyclic number.

It is not a de Polignac number, because 630393905 - 2¹⁴ = 630377521 is a prime.

It is a super-2 number, since 2×630393905² = 794792950922298050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238379 + ... + 241008.

It is an arithmetic number, because the mean of its divisors is an integer number (94918824).

Almost surely, 2^630393905 is an apocalyptic number.

It is an amenable number.

630393905 is a deficient number, since it is larger than the sum of its proper divisors (128956687).

630393905 is a wasteful number, since it uses less digits than its factorization.

630393905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479655.

The product of its (nonzero) digits is 65610, while the sum is 38.

The square root of 630393905 is about 25107.6463452869. The cubic root of 630393905 is about 857.4405175387.

The spelling of 630393905 in words is "six hundred thirty million, three hundred ninety-three thousand, nine hundred five".