85408637 has 6 divisors (see below), whose sum is σ = 89284062. Its totient is φ = 81694712.

The previous prime is 85408633. The next prime is 85408639. The reversal of 85408637 is 73680458.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 83375161 + 2033476 = 9131^2 + 1426^2 .

It is not a de Polignac number, because 85408637 - 2² = 85408633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85408594 and 85408603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85408633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80198 + ... + 81255.

It is an arithmetic number, because the mean of its divisors is an integer number (14880677).

Almost surely, 2^85408637 is an apocalyptic number.

It is an amenable number.

85408637 is a deficient number, since it is larger than the sum of its proper divisors (3875425).

85408637 is a wasteful number, since it uses less digits than its factorization.

85408637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161499 (or 161476 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 85408637 is about 9241.6793387349. The cubic root of 85408637 is about 440.3864322088.

The spelling of 85408637 in words is "eighty-five million, four hundred eight thousand, six hundred thirty-seven".