630188773 has 6 divisors (see below), whose sum is σ = 647377766. Its totient is φ = 613008072.

The previous prime is 630188701. The next prime is 630188791. The reversal of 630188773 is 377881036.

It can be written as a sum of positive squares in only one way, i.e., 613156644 + 17032129 = 24762^2 + 4127^2 .

It is a de Polignac number, because none of the positive numbers 2^k-630188773 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 (630189773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 150636 + ... + 154762.

Almost surely, 2^630188773 is an apocalyptic number.

It is an amenable number.

630188773 is a deficient number, since it is larger than the sum of its proper divisors (17188993).

630188773 is an frugal number, since it uses more digits than its factorization.

630188773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8291 (or 4164 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 630188773 is about 25103.5609625408. The cubic root of 630188773 is about 857.3475029074.

The spelling of 630188773 in words is "six hundred thirty million, one hundred eighty-eight thousand, seven hundred seventy-three".