63309473 has 4 divisors (see below), whose sum is σ = 63392148. Its totient is φ = 63226800.

The previous prime is 63309457. The next prime is 63309487. The reversal of 63309473 is 37490336.

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 33965584 + 29343889 = 5828^2 + 5417^2 .

It is a cyclic number.

It is not a de Polignac number, because 63309473 - 2⁴ = 63309457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63309403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40178 + ... + 41723.

It is an arithmetic number, because the mean of its divisors is an integer number (15848037).

Almost surely, 2^63309473 is an apocalyptic number.

It is an amenable number.

63309473 is a deficient number, since it is larger than the sum of its proper divisors (82675).

63309473 is an equidigital number, since it uses as much as digits as its factorization.

63309473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82674.

The product of its (nonzero) digits is 40824, while the sum is 35.

The square root of 63309473 is about 7956.7250172417. The cubic root of 63309473 is about 398.5561969353.

The spelling of 63309473 in words is "sixty-three million, three hundred nine thousand, four hundred seventy-three".