85427845 has 4 divisors (see below), whose sum is σ = 102513420. Its totient is φ = 68342272.

The previous prime is 85427827. The next prime is 85427893. The reversal of 85427845 is 54872458.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54872458 = 2 ⋅27436229.

It can be written as a sum of positive squares in 2 ways, for example, as 54257956 + 31169889 = 7366^2 + 5583^2 .

It is a cyclic number.

It is not a de Polignac number, because 85427845 - 2⁵ = 85427813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8542780 + ... + 8542789.

It is an arithmetic number, because the mean of its divisors is an integer number (25628355).

Almost surely, 2^85427845 is an apocalyptic number.

It is an amenable number.

85427845 is a deficient number, since it is larger than the sum of its proper divisors (17085575).

85427845 is a wasteful number, since it uses less digits than its factorization.

85427845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17085574.

The product of its digits is 358400, while the sum is 43.

The square root of 85427845 is about 9242.7184853808. The cubic root of 85427845 is about 440.4194433454.

The spelling of 85427845 in words is "eighty-five million, four hundred twenty-seven thousand, eight hundred forty-five".