85811267 has 2 divisors, whose sum is σ = 85811268. Its totient is φ = 85811266.

The previous prime is 85811213. The next prime is 85811279. The reversal of 85811267 is 76211858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85811267 - 2¹² = 85807171 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85811267.

It is not a weakly prime, because it can be changed into another prime (85811207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42905633 + 42905634.

It is an arithmetic number, because the mean of its divisors is an integer number (42905634).

Almost surely, 2^85811267 is an apocalyptic number.

85811267 is a deficient number, since it is larger than the sum of its proper divisors (1).

85811267 is an equidigital number, since it uses as much as digits as its factorization.

85811267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 38.

The square root of 85811267 is about 9263.4371050923. The cubic root of 85811267 is about 441.0773650227.

The spelling of 85811267 in words is "eighty-five million, eight hundred eleven thousand, two hundred sixty-seven".