64423843 has 4 divisors (see below), whose sum is σ = 70280568. Its totient is φ = 58567120.

The previous prime is 64423817. The next prime is 64423861. The reversal of 64423843 is 34832446.

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 64423843 - 2¹⁷ = 64292771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64423799 and 64423808.

It is not an unprimeable number, because it can be changed into a prime (64423343) 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, 2928346 + ... + 2928367.

It is an arithmetic number, because the mean of its divisors is an integer number (17570142).

Almost surely, 2^64423843 is an apocalyptic number.

64423843 is a deficient number, since it is larger than the sum of its proper divisors (5856725).

64423843 is a wasteful number, since it uses less digits than its factorization.

64423843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5856724.

The product of its digits is 55296, while the sum is 34.

The square root of 64423843 is about 8026.4464740008. The cubic root of 64423843 is about 400.8810641401.

The spelling of 64423843 in words is "sixty-four million, four hundred twenty-three thousand, eight hundred forty-three".