63904973 has 8 divisors (see below), whose sum is σ = 69925440. Its totient is φ = 57919680.

The previous prime is 63904963. The next prime is 63904987. The reversal of 63904973 is 37940936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63904973 - 2¹⁰ = 63903949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63904973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63904933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4913 + ... + 12326.

It is an arithmetic number, because the mean of its divisors is an integer number (8740680).

Almost surely, 2^63904973 is an apocalyptic number.

It is an amenable number.

63904973 is a deficient number, since it is larger than the sum of its proper divisors (6020467).

63904973 is a wasteful number, since it uses less digits than its factorization.

63904973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17587.

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 63904973 is about 7994.0586062400. The cubic root of 63904973 is about 399.8019290192.

The spelling of 63904973 in words is "sixty-three million, nine hundred four thousand, nine hundred seventy-three".