64723861 has 8 divisors (see below), whose sum is σ = 68793920. Its totient is φ = 60720192.

The previous prime is 64723859. The next prime is 64723891. The reversal of 64723861 is 16832746.

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 64723861 - 2¹ = 64723859 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 64723861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64723891) 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 7 ways as a sum of consecutive naturals, for example, 14580 + ... + 18493.

It is an arithmetic number, because the mean of its divisors is an integer number (8599240).

Almost surely, 2^64723861 is an apocalyptic number.

It is an amenable number.

64723861 is a deficient number, since it is larger than the sum of its proper divisors (4070059).

64723861 is a wasteful number, since it uses less digits than its factorization.

64723861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33195.

The product of its digits is 48384, while the sum is 37.

The square root of 64723861 is about 8045.1141073325. The cubic root of 64723861 is about 401.5023937178.

The spelling of 64723861 in words is "sixty-four million, seven hundred twenty-three thousand, eight hundred sixty-one".