85182309 has 12 divisors (see below), whose sum is σ = 127284300. Its totient is φ = 54829824.

The previous prime is 85182247. The next prime is 85182311. The reversal of 85182309 is 90328158.

It can be written as a sum of positive squares in 2 ways, for example, as 59629284 + 25553025 = 7722^2 + 5055^2 .

It is not a de Polignac number, because 85182309 - 2⁹ = 85181797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85182509) 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, 162924 + ... + 163445.

It is an arithmetic number, because the mean of its divisors is an integer number (10607025).

Almost surely, 2^85182309 is an apocalyptic number.

It is an amenable number.

85182309 is a deficient number, since it is larger than the sum of its proper divisors (42101991).

85182309 is a wasteful number, since it uses less digits than its factorization.

85182309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326404 (or 326401 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 85182309 is about 9229.4262551905. The cubic root of 85182309 is about 439.9970884794.

It can be divided in two parts, 85182 and 309, that added together give a triangular number (85491 = T₄₁₃).

The spelling of 85182309 in words is "eighty-five million, one hundred eighty-two thousand, three hundred nine".