85444837 has 4 divisors (see below), whose sum is σ = 86201100. Its totient is φ = 84688576.

The previous prime is 85444831. The next prime is 85444859. The reversal of 85444837 is 73844458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73844458 = 2 ⋅36922229.

It can be written as a sum of positive squares in 2 ways, for example, as 20061441 + 65383396 = 4479^2 + 8086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85444837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85444793 and 85444802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85444831) 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, 377962 + ... + 378187.

It is an arithmetic number, because the mean of its divisors is an integer number (21550275).

Almost surely, 2^85444837 is an apocalyptic number.

It is an amenable number.

85444837 is a deficient number, since it is larger than the sum of its proper divisors (756263).

85444837 is a wasteful number, since it uses less digits than its factorization.

85444837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756262.

The product of its digits is 430080, while the sum is 43.

The square root of 85444837 is about 9243.6376497567. The cubic root of 85444837 is about 440.4486419089.

The spelling of 85444837 in words is "eighty-five million, four hundred forty-four thousand, eight hundred thirty-seven".