85473691 has 2 divisors, whose sum is σ = 85473692. Its totient is φ = 85473690.

The previous prime is 85473679. The next prime is 85473719. The reversal of 85473691 is 19637458.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85473691 - 2¹¹ = 85471643 is a prime.

It is not a weakly prime, because it can be changed into another prime (85473601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42736845 + 42736846.

It is an arithmetic number, because the mean of its divisors is an integer number (42736846).

Almost surely, 2^85473691 is an apocalyptic number.

85473691 is a deficient number, since it is larger than the sum of its proper divisors (1).

85473691 is an equidigital number, since it uses as much as digits as its factorization.

85473691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 85473691 is about 9245.1982672088. The cubic root of 85473691 is about 440.4982149250.

The spelling of 85473691 in words is "eighty-five million, four hundred seventy-three thousand, six hundred ninety-one".