85371791 has 4 divisors (see below), whose sum is σ = 89083632. Its totient is φ = 81659952.

The previous prime is 85371779. The next prime is 85371827. The reversal of 85371791 is 19717358.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85371791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85371721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1855886 + ... + 1855931.

It is an arithmetic number, because the mean of its divisors is an integer number (22270908).

Almost surely, 2^85371791 is an apocalyptic number.

85371791 is a deficient number, since it is larger than the sum of its proper divisors (3711841).

85371791 is a wasteful number, since it uses less digits than its factorization.

85371791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711840.

The product of its digits is 52920, while the sum is 41.

The square root of 85371791 is about 9239.6856548261. The cubic root of 85371791 is about 440.3230943037.

The spelling of 85371791 in words is "eighty-five million, three hundred seventy-one thousand, seven hundred ninety-one".