63853906 has 4 divisors (see below), whose sum is σ = 95780862. Its totient is φ = 31926952.

The previous prime is 63853901. The next prime is 63853967. The reversal of 63853906 is 60935836.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42315025 + 21538881 = 6505^2 + 4641^2 .

It is a super-2 number, since 2×63853906² = 8154642622913672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (63853901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15963475 + ... + 15963478.

Almost surely, 2^63853906 is an apocalyptic number.

63853906 is a deficient number, since it is larger than the sum of its proper divisors (31926956).

63853906 is a wasteful number, since it uses less digits than its factorization.

63853906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31926955.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 63853906 is about 7990.8639082392. The cubic root of 63853906 is about 399.6954056145.

The spelling of 63853906 in words is "sixty-three million, eight hundred fifty-three thousand, nine hundred six".