64143687 has 8 divisors (see below), whose sum is σ = 85741936. Its totient is φ = 42653952.

The previous prime is 64143683. The next prime is 64143689. The reversal of 64143687 is 78634146.

64143687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 64143687 - 2² = 64143683 is a prime.

It is a super-2 number, since 2×64143687² = 8228825163907938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64143683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25738 + ... + 28119.

It is an arithmetic number, because the mean of its divisors is an integer number (10717742).

Almost surely, 2^64143687 is an apocalyptic number.

64143687 is a deficient number, since it is larger than the sum of its proper divisors (21598249).

64143687 is a wasteful number, since it uses less digits than its factorization.

64143687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54257.

The product of its digits is 96768, while the sum is 39.

The square root of 64143687 is about 8008.9754026342. The cubic root of 64143687 is about 400.2991241727.

It can be divided in two parts, 6414 and 3687, that added together give a palindrome (10101).

The spelling of 64143687 in words is "sixty-four million, one hundred forty-three thousand, six hundred eighty-seven".