85381237 has 4 divisors (see below), whose sum is σ = 87688876. Its totient is φ = 83073600.

The previous prime is 85381213. The next prime is 85381279. The reversal of 85381237 is 73218358.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59074596 + 26306641 = 7686^2 + 5129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85381237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 2307601 = 85381237 / (8 + 5 + 3 + 8 + 1 + 2 + 3 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85381196 and 85381205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85381207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1153764 + ... + 1153837.

It is an arithmetic number, because the mean of its divisors is an integer number (21922219).

Almost surely, 2^85381237 is an apocalyptic number.

It is an amenable number.

85381237 is a deficient number, since it is larger than the sum of its proper divisors (2307639).

85381237 is a wasteful number, since it uses less digits than its factorization.

85381237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307638.

The product of its digits is 40320, while the sum is 37.

The square root of 85381237 is about 9240.1968052634. The cubic root of 85381237 is about 440.3393336200.

The spelling of 85381237 in words is "eighty-five million, three hundred eighty-one thousand, two hundred thirty-seven".