64708643 has 4 divisors (see below), whose sum is σ = 64725528. Its totient is φ = 64691760.

The previous prime is 64708639. The next prime is 64708669. The reversal of 64708643 is 34680746.

It is a happy number.

64708643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 64708643 - 2² = 64708639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64708597 and 64708606.

It is not an unprimeable number, because it can be changed into a prime (64788643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380 + ... + 11382.

It is an arithmetic number, because the mean of its divisors is an integer number (16181382).

Almost surely, 2^64708643 is an apocalyptic number.

64708643 is a deficient number, since it is larger than the sum of its proper divisors (16885).

64708643 is a wasteful number, since it uses less digits than its factorization.

64708643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16884.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 64708643 is about 8044.1682602989. The cubic root of 64708643 is about 401.4709239102.

The spelling of 64708643 in words is "sixty-four million, seven hundred eight thousand, six hundred forty-three".