63667947 has 8 divisors (see below), whose sum is σ = 97017856. Its totient is φ = 36381672.

The previous prime is 63667943. The next prime is 63667951. The reversal of 63667947 is 74976636.

It is an interprime number because it is at equal distance from previous prime (63667943) and next prime (63667951).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63667947 - 2² = 63667943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63667896 and 63667905.

It is not an unprimeable number, because it can be changed into a prime (63667943) 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 7 ways as a sum of consecutive naturals, for example, 1515883 + ... + 1515924.

It is an arithmetic number, because the mean of its divisors is an integer number (12127232).

Almost surely, 2^63667947 is an apocalyptic number.

63667947 is a deficient number, since it is larger than the sum of its proper divisors (33349909).

63667947 is a wasteful number, since it uses less digits than its factorization.

63667947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031817.

The product of its digits is 1143072, while the sum is 48.

The square root of 63667947 is about 7979.2196986923. The cubic root of 63667947 is about 399.3070230674.

The spelling of 63667947 in words is "sixty-three million, six hundred sixty-seven thousand, nine hundred forty-seven".