31113893 has 8 divisors (see below), whose sum is σ = 33040512. Its totient is φ = 29198016.

The previous prime is 31113889. The next prime is 31113911. The reversal of 31113893 is 39831113.

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 31113893 - 2² = 31113889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113853) 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 7 ways as a sum of consecutive naturals, for example, 3746 + ... + 8732.

It is an arithmetic number, because the mean of its divisors is an integer number (4130064).

Almost surely, 2^31113893 is an apocalyptic number.

It is an amenable number.

31113893 is a deficient number, since it is larger than the sum of its proper divisors (1926619).

31113893 is a wasteful number, since it uses less digits than its factorization.

31113893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371.

The product of its digits is 1944, while the sum is 29.

The square root of 31113893 is about 5577.9828791419. The cubic root of 31113893 is about 314.5223060992.

The spelling of 31113893 in words is "thirty-one million, one hundred thirteen thousand, eight hundred ninety-three".