856427523 has 8 divisors (see below), whose sum is σ = 1305032448. Its totient is φ = 489387144.

The previous prime is 856427521. The next prime is 856427543. The reversal of 856427523 is 325724658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 856427523 - 2¹ = 856427521 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (856427521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20391111 + ... + 20391152.

It is an arithmetic number, because the mean of its divisors is an integer number (163129056).

Almost surely, 2^856427523 is an apocalyptic number.

856427523 is a deficient number, since it is larger than the sum of its proper divisors (448604925).

856427523 is a wasteful number, since it uses less digits than its factorization.

856427523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40782273.

The product of its digits is 403200, while the sum is 42.

The square root of 856427523 is about 29264.7829822809. The cubic root of 856427523 is about 949.6499256767.

The spelling of 856427523 in words is "eight hundred fifty-six million, four hundred twenty-seven thousand, five hundred twenty-three".