630555073 has 4 divisors (see below), whose sum is σ = 647597140. Its totient is φ = 613513008.

The previous prime is 630555061. The next prime is 630555077. The reversal of 630555073 is 370555036.

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 356718769 + 273836304 = 18887^2 + 16548^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630555073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630555077) 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, 8520978 + ... + 8521051.

It is an arithmetic number, because the mean of its divisors is an integer number (161899285).

Almost surely, 2^630555073 is an apocalyptic number.

It is an amenable number.

630555073 is a deficient number, since it is larger than the sum of its proper divisors (17042067).

630555073 is a wasteful number, since it uses less digits than its factorization.

630555073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17042066.

The product of its (nonzero) digits is 47250, while the sum is 34.

The square root of 630555073 is about 25110.8556803626. The cubic root of 630555073 is about 857.5135830707.

The spelling of 630555073 in words is "six hundred thirty million, five hundred fifty-five thousand, seventy-three".