630745013 has 4 divisors (see below), whose sum is σ = 633090060. Its totient is φ = 628399968.

The previous prime is 630745007. The next prime is 630745051. The reversal of 630745013 is 310547036.

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 335695684 + 295049329 = 18322^2 + 17177^2 .

It is a cyclic number.

It is not a de Polignac number, because 630745013 - 2⁶ = 630744949 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 (630745513) 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, 1172120 + ... + 1172657.

It is an arithmetic number, because the mean of its divisors is an integer number (158272515).

Almost surely, 2^630745013 is an apocalyptic number.

It is an amenable number.

630745013 is a deficient number, since it is larger than the sum of its proper divisors (2345047).

630745013 is a wasteful number, since it uses less digits than its factorization.

630745013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345046.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 630745013 is about 25114.6374252148. The cubic root of 630745013 is about 857.5996764116.

The spelling of 630745013 in words is "six hundred thirty million, seven hundred forty-five thousand, thirteen".