630844733 has 4 divisors (see below), whose sum is σ = 633462588. Its totient is φ = 628226880.

The previous prime is 630844729. The next prime is 630844751. The reversal of 630844733 is 337448036.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 527069764 + 103774969 = 22958^2 + 10187^2 .

It is a cyclic number.

It is not a de Polignac number, because 630844733 - 2² = 630844729 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 (630844033) 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, 1308566 + ... + 1309047.

It is an arithmetic number, because the mean of its divisors is an integer number (158365647).

Almost surely, 2^630844733 is an apocalyptic number.

It is an amenable number.

630844733 is a deficient number, since it is larger than the sum of its proper divisors (2617855).

630844733 is a wasteful number, since it uses less digits than its factorization.

630844733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617854.

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 630844733 is about 25116.6226431819. The cubic root of 630844733 is about 857.6448691765.

The spelling of 630844733 in words is "six hundred thirty million, eight hundred forty-four thousand, seven hundred thirty-three".