64959143 has 4 divisors (see below), whose sum is σ = 65389488. Its totient is φ = 64528800.

The previous prime is 64959133. The next prime is 64959163. The reversal of 64959143 is 34195946.

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 64959143 - 2¹⁰ = 64958119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64959143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64959133) 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, 214946 + ... + 215247.

It is an arithmetic number, because the mean of its divisors is an integer number (16347372).

Almost surely, 2^64959143 is an apocalyptic number.

64959143 is a deficient number, since it is larger than the sum of its proper divisors (430345).

64959143 is a wasteful number, since it uses less digits than its factorization.

64959143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430344.

The product of its digits is 116640, while the sum is 41.

The square root of 64959143 is about 8059.7235064238. The cubic root of 64959143 is about 401.9883147185.

The spelling of 64959143 in words is "sixty-four million, nine hundred fifty-nine thousand, one hundred forty-three".