31068685 has 4 divisors (see below), whose sum is σ = 37282428. Its totient is φ = 24854944.

The previous prime is 31068683. The next prime is 31068691. The reversal of 31068685 is 58686013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58686013 = 43 ⋅1364791.

It can be written as a sum of positive squares in 2 ways, for example, as 3337929 + 27730756 = 1827^2 + 5266^2 .

It is a cyclic number.

It is not a de Polignac number, because 31068685 - 2¹ = 31068683 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 (31068683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3106864 + ... + 3106873.

It is an arithmetic number, because the mean of its divisors is an integer number (9320607).

Almost surely, 2^31068685 is an apocalyptic number.

It is an amenable number.

31068685 is a deficient number, since it is larger than the sum of its proper divisors (6213743).

31068685 is an equidigital number, since it uses as much as digits as its factorization.

31068685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6213742.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 31068685 is about 5573.9290451171. The cubic root of 31068685 is about 314.3699002634.

The spelling of 31068685 in words is "thirty-one million, sixty-eight thousand, six hundred eighty-five".