64020843 has 12 divisors (see below), whose sum is σ = 92881360. Its totient is φ = 42492816.

The previous prime is 64020839. The next prime is 64020857. The reversal of 64020843 is 34802046.

It is not a de Polignac number, because 64020843 - 2² = 64020839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64020833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13471 + ... + 17592.

Almost surely, 2^64020843 is an apocalyptic number.

64020843 is a deficient number, since it is larger than the sum of its proper divisors (28860517).

64020843 is a wasteful number, since it uses less digits than its factorization.

64020843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31298 (or 31295 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 64020843 is about 8001.3025814551. The cubic root of 64020843 is about 400.0434182036.

Adding to 64020843 its reverse (34802046), we get a palindrome (98822889).

The spelling of 64020843 in words is "sixty-four million, twenty thousand, eight hundred forty-three".