85811023 has 2 divisors, whose sum is σ = 85811024. Its totient is φ = 85811022.

The previous prime is 85811021. The next prime is 85811027. The reversal of 85811023 is 32011858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85811023 - 2¹ = 85811021 is a prime.

Together with 85811021, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 85810982 and 85811000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85811021) 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 as a sum of consecutive naturals, namely, 42905511 + 42905512.

It is an arithmetic number, because the mean of its divisors is an integer number (42905512).

Almost surely, 2^85811023 is an apocalyptic number.

85811023 is a deficient number, since it is larger than the sum of its proper divisors (1).

85811023 is an equidigital number, since it uses as much as digits as its factorization.

85811023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 85811023 is about 9263.4239350253. The cubic root of 85811023 is about 441.0769469619.

It can be divided in two parts, 8581 and 1023, that added together give a square (9604 = 98²).

The spelling of 85811023 in words is "eighty-five million, eight hundred eleven thousand, twenty-three".