85937813 has 4 divisors (see below), whose sum is σ = 92548428. Its totient is φ = 79327200.

The previous prime is 85937801. The next prime is 85937843. The reversal of 85937813 is 31873958.

It is a happy number.

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 6959044 + 78978769 = 2638^2 + 8887^2 .

It is a cyclic number.

It is not a de Polignac number, because 85937813 - 2¹² = 85933717 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 (85937843) 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, 3305288 + ... + 3305313.

It is an arithmetic number, because the mean of its divisors is an integer number (23137107).

Almost surely, 2^85937813 is an apocalyptic number.

It is an amenable number.

85937813 is a deficient number, since it is larger than the sum of its proper divisors (6610615).

85937813 is a wasteful number, since it uses less digits than its factorization.

85937813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6610614.

The product of its digits is 181440, while the sum is 44.

The square root of 85937813 is about 9270.2649908188. The cubic root of 85937813 is about 441.2940776722.

The spelling of 85937813 in words is "eighty-five million, nine hundred thirty-seven thousand, eight hundred thirteen".