85090823 has 4 divisors (see below), whose sum is σ = 88790448. Its totient is φ = 81391200.

The previous prime is 85090813. The next prime is 85090829. The reversal of 85090823 is 32809058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32809058 = 2 ⋅16404529.

It is a cyclic number.

It is not a de Polignac number, because 85090823 - 2⁴ = 85090807 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 (85090829) 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, 1849778 + ... + 1849823.

It is an arithmetic number, because the mean of its divisors is an integer number (22197612).

Almost surely, 2^85090823 is an apocalyptic number.

85090823 is a deficient number, since it is larger than the sum of its proper divisors (3699625).

85090823 is a wasteful number, since it uses less digits than its factorization.

85090823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3699624.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 85090823 is about 9224.4687109882. The cubic root of 85090823 is about 439.8395127514.

The spelling of 85090823 in words is "eighty-five million, ninety thousand, eight hundred twenty-three".