63189947173 has 2 divisors, whose sum is σ = 63189947174. Its totient is φ = 63189947172.

The previous prime is 63189947131. The next prime is 63189947287. The reversal of 63189947173 is 37174998136.

63189947173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37064720484 + 26125226689 = 192522^2 + 161633^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63189947173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63189947123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31594973586 + 31594973587.

It is an arithmetic number, because the mean of its divisors is an integer number (31594973587).

Almost surely, 2^63189947173 is an apocalyptic number.

It is an amenable number.

63189947173 is a deficient number, since it is larger than the sum of its proper divisors (1).

63189947173 is an equidigital number, since it uses as much as digits as its factorization.

63189947173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6858432, while the sum is 58.

The spelling of 63189947173 in words is "sixty-three billion, one hundred eighty-nine million, nine hundred forty-seven thousand, one hundred seventy-three".