64089643 has 4 divisors (see below), whose sum is σ = 67859640. Its totient is φ = 60319648.

The previous prime is 64089607. The next prime is 64089647. The reversal of 64089643 is 34698046.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64089643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64089596 and 64089605.

It is not an unprimeable number, because it can be changed into a prime (64089647) 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, 1884973 + ... + 1885006.

It is an arithmetic number, because the mean of its divisors is an integer number (16964910).

Almost surely, 2^64089643 is an apocalyptic number.

64089643 is a deficient number, since it is larger than the sum of its proper divisors (3769997).

64089643 is a wasteful number, since it uses less digits than its factorization.

64089643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3769996.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 64089643 is about 8005.6007269911. The cubic root of 64089643 is about 400.1866691230.

The spelling of 64089643 in words is "sixty-four million, eighty-nine thousand, six hundred forty-three".