63621473 has 4 divisors (see below), whose sum is σ = 66387648. Its totient is φ = 60855300.

The previous prime is 63621461. The next prime is 63621479. The reversal of 63621473 is 37412636.

63621473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63621473 - 2¹⁴ = 63605089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63621479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1383053 + ... + 1383098.

It is an arithmetic number, because the mean of its divisors is an integer number (16596912).

Almost surely, 2^63621473 is an apocalyptic number.

It is an amenable number.

63621473 is a deficient number, since it is larger than the sum of its proper divisors (2766175).

63621473 is a wasteful number, since it uses less digits than its factorization.

63621473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766174.

The product of its digits is 18144, while the sum is 32.

The square root of 63621473 is about 7976.3069775429. The cubic root of 63621473 is about 399.2098422379.

The spelling of 63621473 in words is "sixty-three million, six hundred twenty-one thousand, four hundred seventy-three".