63668473 has 4 divisors (see below), whose sum is σ = 69456528. Its totient is φ = 57880420.

The previous prime is 63668471. The next prime is 63668477. The reversal of 63668473 is 37486636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63668473 - 2¹ = 63668471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63668471) 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, 2894011 + ... + 2894032.

It is an arithmetic number, because the mean of its divisors is an integer number (17364132).

Almost surely, 2^63668473 is an apocalyptic number.

It is an amenable number.

63668473 is a deficient number, since it is larger than the sum of its proper divisors (5788055).

63668473 is a wasteful number, since it uses less digits than its factorization.

63668473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5788054.

The product of its digits is 435456, while the sum is 43.

The square root of 63668473 is about 7979.2526592407. The cubic root of 63668473 is about 399.3081227045.

The spelling of 63668473 in words is "sixty-three million, six hundred sixty-eight thousand, four hundred seventy-three".