85869437 has 4 divisors (see below), whose sum is σ = 86657340. Its totient is φ = 85081536.

The previous prime is 85869391. The next prime is 85869461. The reversal of 85869437 is 73496858.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73496858 = 2 ⋅36748429.

It can be written as a sum of positive squares in 2 ways, for example, as 76983076 + 8886361 = 8774^2 + 2981^2 .

It is a cyclic number.

It is not a de Polignac number, because 85869437 - 2⁸ = 85869181 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 (85869467) 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, 393788 + ... + 394005.

It is an arithmetic number, because the mean of its divisors is an integer number (21664335).

Almost surely, 2^85869437 is an apocalyptic number.

It is an amenable number.

85869437 is a deficient number, since it is larger than the sum of its proper divisors (787903).

85869437 is a wasteful number, since it uses less digits than its factorization.

85869437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787902.

The product of its digits is 1451520, while the sum is 50.

The square root of 85869437 is about 9266.5763364902. The cubic root of 85869437 is about 441.1770087945.

The spelling of 85869437 in words is "eighty-five million, eight hundred sixty-nine thousand, four hundred thirty-seven".