64843961 has 8 divisors (see below), whose sum is σ = 79808064. Its totient is φ = 51305040.

The previous prime is 64843949. The next prime is 64843981. The reversal of 64843961 is 16934846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64843961 - 2¹⁰ = 64842937 is a prime.

It is a super-3 number, since 3×64843961³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (64843901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356195 + ... + 356376.

It is an arithmetic number, because the mean of its divisors is an integer number (9976008).

Almost surely, 2^64843961 is an apocalyptic number.

It is an amenable number.

64843961 is a deficient number, since it is larger than the sum of its proper divisors (14964103).

64843961 is a wasteful number, since it uses less digits than its factorization.

64843961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712591.

The product of its digits is 124416, while the sum is 41.

The square root of 64843961 is about 8052.5748056134. The cubic root of 64843961 is about 401.7505795847.

The spelling of 64843961 in words is "sixty-four million, eight hundred forty-three thousand, nine hundred sixty-one".