63964939 has 4 divisors (see below), whose sum is σ = 64149624. Its totient is φ = 63780256.

The previous prime is 63964937. The next prime is 63964969. The reversal of 63964939 is 93946936.

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 63964939 - 2¹ = 63964937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63964892 and 63964901.

It is not an unprimeable number, because it can be changed into a prime (63964937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91822 + ... + 92515.

It is an arithmetic number, because the mean of its divisors is an integer number (16037406).

Almost surely, 2^63964939 is an apocalyptic number.

63964939 is a deficient number, since it is larger than the sum of its proper divisors (184685).

63964939 is a wasteful number, since it uses less digits than its factorization.

63964939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184684.

The product of its digits is 944784, while the sum is 49.

The square root of 63964939 is about 7997.8083873021. The cubic root of 63964939 is about 399.9269429075.

The spelling of 63964939 in words is "sixty-three million, nine hundred sixty-four thousand, nine hundred thirty-nine".