64856123 has 4 divisors (see below), whose sum is σ = 66948288. Its totient is φ = 62763960.

The previous prime is 64856111. The next prime is 64856131. The reversal of 64856123 is 32165846.

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 64856123 - 2⁴ = 64856107 is a prime.

It is a super-2 number, since 2×64856123² = 8412633381182258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64856023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046036 + ... + 1046097.

It is an arithmetic number, because the mean of its divisors is an integer number (16737072).

Almost surely, 2^64856123 is an apocalyptic number.

64856123 is a deficient number, since it is larger than the sum of its proper divisors (2092165).

64856123 is a wasteful number, since it uses less digits than its factorization.

64856123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092164.

The product of its digits is 34560, while the sum is 35.

The square root of 64856123 is about 8053.3299323944. The cubic root of 64856123 is about 401.7756951854.

The spelling of 64856123 in words is "sixty-four million, eight hundred fifty-six thousand, one hundred twenty-three".