71789085 has 20 divisors (see below), whose sum is σ = 128689308. Its totient is φ = 38287296.

The previous prime is 71789071. The next prime is 71789101. The reversal of 71789085 is 58098717.

It can be written as a sum of positive squares in 2 ways, for example, as 56881764 + 14907321 = 7542^2 + 3861^2 .

It is not a de Polignac number, because 71789085 - 2¹³ = 71780893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 71789085.

It is a congruent number.

It is an unprimeable number.

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 in 19 ways as a sum of consecutive naturals, for example, 88224 + ... + 89033.

Almost surely, 2^71789085 is an apocalyptic number.

It is an amenable number.

71789085 is a deficient number, since it is larger than the sum of its proper divisors (56900223).

71789085 is a wasteful number, since it uses less digits than its factorization.

71789085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177274 (or 177265 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 71789085 is about 8472.8439735428. The cubic root of 71789085 is about 415.6101442671.

The spelling of 71789085 in words is "seventy-one million, seven hundred eighty-nine thousand, eighty-five".