31868617 has 12 divisors (see below), whose sum is σ = 35561008. Its totient is φ = 28531800.

The previous prime is 31868561. The next prime is 31868647. The reversal of 31868617 is 71686813.

It is not a de Polignac number, because 31868617 - 2¹⁹ = 31344329 is a prime.

It is a super-3 number, since 3×31868617³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31868617.

It is not an unprimeable number, because it can be changed into a prime (31868647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6142 + ... + 10072.

Almost surely, 2^31868617 is an apocalyptic number.

It is an amenable number.

31868617 is a deficient number, since it is larger than the sum of its proper divisors (3692391).

31868617 is a wasteful number, since it uses less digits than its factorization.

31868617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020 (or 4009 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 31868617 is about 5645.2295790340. The cubic root of 31868617 is about 317.0451195782.

The spelling of 31868617 in words is "thirty-one million, eight hundred sixty-eight thousand, six hundred seventeen".