64683687 has 8 divisors (see below), whose sum is σ = 87214320. Its totient is φ = 42637760.

The previous prime is 64683683. The next prime is 64683709. The reversal of 64683687 is 78638646.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64683687 - 2² = 64683683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64683683) 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, 120864 + ... + 121397.

It is an arithmetic number, because the mean of its divisors is an integer number (10901790).

Almost surely, 2^64683687 is an apocalyptic number.

64683687 is a deficient number, since it is larger than the sum of its proper divisors (22530633).

64683687 is a wasteful number, since it uses less digits than its factorization.

64683687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242353.

The product of its digits is 1161216, while the sum is 48.

The square root of 64683687 is about 8042.6169248572. The cubic root of 64683687 is about 401.4193058872.

The spelling of 64683687 in words is "sixty-four million, six hundred eighty-three thousand, six hundred eighty-seven".