85638793 has 8 divisors (see below), whose sum is σ = 87021000. Its totient is φ = 84267648.

The previous prime is 85638779. The next prime is 85638811. The reversal of 85638793 is 39783658.

It can be written as a sum of positive squares in 4 ways, for example, as 6215049 + 79423744 = 2493^2 + 8912^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85638793 - 2⁹ = 85638281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85638703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13605 + ... + 18877.

It is an arithmetic number, because the mean of its divisors is an integer number (10877625).

Almost surely, 2^85638793 is an apocalyptic number.

It is an amenable number.

85638793 is a deficient number, since it is larger than the sum of its proper divisors (1382207).

85638793 is a wasteful number, since it uses less digits than its factorization.

85638793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531.

The product of its digits is 1088640, while the sum is 49.

The square root of 85638793 is about 9254.1230270620. The cubic root of 85638793 is about 440.7816563705.

The spelling of 85638793 in words is "eighty-five million, six hundred thirty-eight thousand, seven hundred ninety-three".