85072771 has 6 divisors (see below), whose sum is σ = 98962260. Its totient is φ = 72919476.

The previous prime is 85072763. The next prime is 85072787. The reversal of 85072771 is 17727058.

It is not a de Polignac number, because 85072771 - 2³ = 85072763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85072771.

It is not an unprimeable number, because it can be changed into a prime (85072571) 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 in 5 ways as a sum of consecutive naturals, for example, 868041 + ... + 868138.

It is an arithmetic number, because the mean of its divisors is an integer number (16493710).

Almost surely, 2^85072771 is an apocalyptic number.

85072771 is a deficient number, since it is larger than the sum of its proper divisors (13889489).

85072771 is a wasteful number, since it uses less digits than its factorization.

85072771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736193 (or 1736186 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 85072771 is about 9223.4901745489. The cubic root of 85072771 is about 439.8084065985.

The spelling of 85072771 in words is "eighty-five million, seventy-two thousand, seven hundred seventy-one".