64072943 has 4 divisors (see below), whose sum is σ = 69897768. Its totient is φ = 58248120.

The previous prime is 64072933. The next prime is 64072961. The reversal of 64072943 is 34927046.

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

It is a cyclic number.

It is not a de Polignac number, because 64072943 - 2¹⁰ = 64071919 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 (64072933) 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, 2912396 + ... + 2912417.

It is an arithmetic number, because the mean of its divisors is an integer number (17474442).

Almost surely, 2^64072943 is an apocalyptic number.

64072943 is a deficient number, since it is larger than the sum of its proper divisors (5824825).

64072943 is a wasteful number, since it uses less digits than its factorization.

64072943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5824824.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 64072943 is about 8004.5576392453. The cubic root of 64072943 is about 400.1519068868.

Adding to 64072943 its reverse (34927046), we get a palindrome (98999989).

The spelling of 64072943 in words is "sixty-four million, seventy-two thousand, nine hundred forty-three".