85851023 has 2 divisors, whose sum is σ = 85851024. Its totient is φ = 85851022.

The previous prime is 85851011. The next prime is 85851041. The reversal of 85851023 is 32015858.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85851023 - 2¹² = 85846927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85851323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42925511 + 42925512.

It is an arithmetic number, because the mean of its divisors is an integer number (42925512).

Almost surely, 2^85851023 is an apocalyptic number.

85851023 is a deficient number, since it is larger than the sum of its proper divisors (1).

85851023 is an equidigital number, since it uses as much as digits as its factorization.

85851023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 85851023 is about 9265.5827123824. The cubic root of 85851023 is about 441.1454709370.

It can be divided in two parts, 858 and 51023, that multiplied together give a palindrome (43777734).

The spelling of 85851023 in words is "eighty-five million, eight hundred fifty-one thousand, twenty-three".