63959963 has 4 divisors (see below), whose sum is σ = 65447448. Its totient is φ = 62472480.

The previous prime is 63959911. The next prime is 63959977. The reversal of 63959963 is 36995936.

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

It is a cyclic number.

It is not a de Polignac number, because 63959963 - 2¹² = 63955867 is a prime.

It is a super-2 number, since 2×63959963² = 8181753733922738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63959983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743678 + ... + 743763.

It is an arithmetic number, because the mean of its divisors is an integer number (16361862).

Almost surely, 2^63959963 is an apocalyptic number.

63959963 is a deficient number, since it is larger than the sum of its proper divisors (1487485).

63959963 is a wasteful number, since it uses less digits than its factorization.

63959963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487484.

The product of its digits is 1180980, while the sum is 50.

The square root of 63959963 is about 7997.4972960296. The cubic root of 63959963 is about 399.9165721840.

The spelling of 63959963 in words is "sixty-three million, nine hundred fifty-nine thousand, nine hundred sixty-three".