64872543 has 4 divisors (see below), whose sum is σ = 86496728. Its totient is φ = 43248360.

The previous prime is 64872529. The next prime is 64872589. The reversal of 64872543 is 34527846.

It is a happy number.

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

It is not a de Polignac number, because 64872543 - 2¹³ = 64864351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64872943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10812088 + ... + 10812093.

It is an arithmetic number, because the mean of its divisors is an integer number (21624182).

Almost surely, 2^64872543 is an apocalyptic number.

64872543 is a deficient number, since it is larger than the sum of its proper divisors (21624185).

64872543 is a wasteful number, since it uses less digits than its factorization.

64872543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21624184.

The product of its digits is 161280, while the sum is 39.

The square root of 64872543 is about 8054.3493219502. The cubic root of 64872543 is about 401.8095989503.

The spelling of 64872543 in words is "sixty-four million, eight hundred seventy-two thousand, five hundred forty-three".