856064623 has 4 divisors (see below), whose sum is σ = 893284848. Its totient is φ = 818844400.

The previous prime is 856064611. The next prime is 856064701. The reversal of 856064623 is 326460658.

It is a happy number.

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 856064623 - 2⁵ = 856064591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856064603) 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, 18610078 + ... + 18610123.

It is an arithmetic number, because the mean of its divisors is an integer number (223321212).

Almost surely, 2^856064623 is an apocalyptic number.

856064623 is a deficient number, since it is larger than the sum of its proper divisors (37220225).

856064623 is a wasteful number, since it uses less digits than its factorization.

856064623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37220224.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 856064623 is about 29258.5820401468. The cubic root of 856064623 is about 949.5157728004.

The spelling of 856064623 in words is "eight hundred fifty-six million, sixty-four thousand, six hundred twenty-three".