64837543 has 4 divisors (see below), whose sum is σ = 64996480. Its totient is φ = 64678608.

The previous prime is 64837537. The next prime is 64837547. The reversal of 64837543 is 34573846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34573846 = 2 ⋅17286923.

It is a cyclic number.

It is not a de Polignac number, because 64837543 - 2⁵ = 64837511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64837496 and 64837505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64837547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78855 + ... + 79672.

It is an arithmetic number, because the mean of its divisors is an integer number (16249120).

Almost surely, 2^64837543 is an apocalyptic number.

64837543 is a deficient number, since it is larger than the sum of its proper divisors (158937).

64837543 is a wasteful number, since it uses less digits than its factorization.

64837543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158936.

The product of its digits is 241920, while the sum is 40.

The square root of 64837543 is about 8052.1762896747. The cubic root of 64837543 is about 401.7373245837.

The spelling of 64837543 in words is "sixty-four million, eight hundred thirty-seven thousand, five hundred forty-three".