85811423 has 4 divisors (see below), whose sum is σ = 85838688. Its totient is φ = 85784160.

The previous prime is 85811417. The next prime is 85811471. The reversal of 85811423 is 32411858.

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 85811423 - 2¹⁸ = 85549279 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 85811423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85811023) 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, 8186 + ... + 15447.

It is an arithmetic number, because the mean of its divisors is an integer number (21459672).

Almost surely, 2^85811423 is an apocalyptic number.

85811423 is a deficient number, since it is larger than the sum of its proper divisors (27265).

85811423 is a wasteful number, since it uses less digits than its factorization.

85811423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27264.

The product of its digits is 7680, while the sum is 32.

The square root of 85811423 is about 9263.4455252892. The cubic root of 85811423 is about 441.0776323070.

The spelling of 85811423 in words is "eighty-five million, eight hundred eleven thousand, four hundred twenty-three".