63917963 has 4 divisors (see below), whose sum is σ = 64818288. Its totient is φ = 63017640.

The previous prime is 63917941. The next prime is 63917983. The reversal of 63917963 is 36971936.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63917963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63917923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450056 + ... + 450197.

It is an arithmetic number, because the mean of its divisors is an integer number (16204572).

Almost surely, 2^63917963 is an apocalyptic number.

63917963 is a deficient number, since it is larger than the sum of its proper divisors (900325).

63917963 is an equidigital number, since it uses as much as digits as its factorization.

63917963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900324.

The product of its digits is 183708, while the sum is 44.

The square root of 63917963 is about 7994.8710433627. The cubic root of 63917963 is about 399.8290165054.

The spelling of 63917963 in words is "sixty-three million, nine hundred seventeen thousand, nine hundred sixty-three".