63920906 has 16 divisors (see below), whose sum is σ = 109697280. Its totient is φ = 27365040.

The previous prime is 63920897. The next prime is 63920911. The reversal of 63920906 is 60902936.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15380 + ... + 19088.

It is an arithmetic number, because the mean of its divisors is an integer number (6856080).

Almost surely, 2^63920906 is an apocalyptic number.

63920906 is a deficient number, since it is larger than the sum of its proper divisors (45776374).

63920906 is a wasteful number, since it uses less digits than its factorization.

63920906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 63920906 is about 7995.0550967457. The cubic root of 63920906 is about 399.8351529063.

The spelling of 63920906 in words is "sixty-three million, nine hundred twenty thousand, nine hundred six".