31089113 has 8 divisors (see below), whose sum is σ = 34252416. Its totient is φ = 27982000.

The previous prime is 31089109. The next prime is 31089119. The reversal of 31089113 is 31198013.

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 31089113 - 2² = 31089109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31089119) 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, 12881 + ... + 15102.

It is an arithmetic number, because the mean of its divisors is an integer number (4281552).

Almost surely, 2^31089113 is an apocalyptic number.

It is an amenable number.

31089113 is a deficient number, since it is larger than the sum of its proper divisors (3163303).

31089113 is a wasteful number, since it uses less digits than its factorization.

31089113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28095.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 31089113 is about 5575.7612036385. The cubic root of 31089113 is about 314.4387857165.

Subtracting 31089113 from its reverse (31198013), we obtain a square (108900 = 330²).

It can be divided in two parts, 3108 and 9113, that added together give a palindrome (12221).

The spelling of 31089113 in words is "thirty-one million, eighty-nine thousand, one hundred thirteen".