85723565 has 16 divisors (see below), whose sum is σ = 106991280. Its totient is φ = 65856000.

The previous prime is 85723559. The next prime is 85723597. The reversal of 85723565 is 56532758.

It can be written as a sum of positive squares in 8 ways, for example, as 6620329 + 79103236 = 2573^2 + 8894^2 .

It is not a de Polignac number, because 85723565 - 2⁴ = 85723549 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27065 + ... + 30065.

It is an arithmetic number, because the mean of its divisors is an integer number (6686955).

Almost surely, 2^85723565 is an apocalyptic number.

It is an amenable number.

85723565 is a deficient number, since it is larger than the sum of its proper divisors (21267715).

85723565 is a wasteful number, since it uses less digits than its factorization.

85723565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232.

The product of its digits is 252000, while the sum is 41.

The square root of 85723565 is about 9258.7021228680. The cubic root of 85723565 is about 440.9270485026.

The spelling of 85723565 in words is "eighty-five million, seven hundred twenty-three thousand, five hundred sixty-five".