630550643 has 4 divisors (see below), whose sum is σ = 630605448. Its totient is φ = 630495840.

The previous prime is 630550631. The next prime is 630550649. The reversal of 630550643 is 346055036.

630550643 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 brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 630550643 - 2¹² = 630546547 is a prime.

It is a super-2 number, since 2×630550643² = 795188226775426898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630550649) 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, 2753 + ... + 35618.

It is an arithmetic number, because the mean of its divisors is an integer number (157651362).

Almost surely, 2^630550643 is an apocalyptic number.

630550643 is a deficient number, since it is larger than the sum of its proper divisors (54805).

630550643 is a wasteful number, since it uses less digits than its factorization.

630550643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54804.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 630550643 is about 25110.7674713458. The cubic root of 630550643 is about 857.5115748961.

The spelling of 630550643 in words is "six hundred thirty million, five hundred fifty thousand, six hundred forty-three".