64543073 has 4 divisors (see below), whose sum is σ = 73763520. Its totient is φ = 55322628.

The previous prime is 64543049. The next prime is 64543081. The reversal of 64543073 is 37034546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64543073 - 2¹² = 64538977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64543573) 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, 4610213 + ... + 4610226.

It is an arithmetic number, because the mean of its divisors is an integer number (18440880).

Almost surely, 2^64543073 is an apocalyptic number.

It is an amenable number.

64543073 is a deficient number, since it is larger than the sum of its proper divisors (9220447).

64543073 is an equidigital number, since it uses as much as digits as its factorization.

64543073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9220446.

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 64543073 is about 8033.8703624094. The cubic root of 64543073 is about 401.1282169080.

The spelling of 64543073 in words is "sixty-four million, five hundred forty-three thousand, seventy-three".