64843811 has 4 divisors (see below), whose sum is σ = 65052624. Its totient is φ = 64635000.

The previous prime is 64843781. The next prime is 64843817. The reversal of 64843811 is 11834846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11834846 = 2 ⋅5917423.

It is a cyclic number.

It is not a de Polignac number, because 64843811 - 2¹⁰ = 64842787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64843817) 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, 103940 + ... + 104561.

It is an arithmetic number, because the mean of its divisors is an integer number (16263156).

Almost surely, 2^64843811 is an apocalyptic number.

64843811 is a deficient number, since it is larger than the sum of its proper divisors (208813).

64843811 is a wasteful number, since it uses less digits than its factorization.

64843811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208812.

The product of its digits is 18432, while the sum is 35.

The square root of 64843811 is about 8052.5654918169. The cubic root of 64843811 is about 401.7502698019.

The spelling of 64843811 in words is "sixty-four million, eight hundred forty-three thousand, eight hundred eleven".