85855791 has 12 divisors (see below), whose sum is σ = 133164312. Its totient is φ = 49060368.

The previous prime is 85855789. The next prime is 85855807. The reversal of 85855791 is 19755858.

It is not a de Polignac number, because 85855791 - 2¹ = 85855789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85855791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85855741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 291880 + ... + 292173.

It is an arithmetic number, because the mean of its divisors is an integer number (11097026).

Almost surely, 2^85855791 is an apocalyptic number.

85855791 is a deficient number, since it is larger than the sum of its proper divisors (47308521).

85855791 is a wasteful number, since it uses less digits than its factorization.

85855791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584070 (or 584063 counting only the distinct ones).

The product of its digits is 504000, while the sum is 48.

The square root of 85855791 is about 9265.8400050940. The cubic root of 85855791 is about 441.1536375749.

The spelling of 85855791 in words is "eighty-five million, eight hundred fifty-five thousand, seven hundred ninety-one".