31134393 has 12 divisors (see below), whose sum is σ = 45092580. Its totient is φ = 20700576.

The previous prime is 31134391. The next prime is 31134401. The reversal of 31134393 is 39343113.

31134393 is a `hidden beast` number, since 311 + 343 + 9 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5702544 + 25431849 = 2388^2 + 5043^2 .

It is not a de Polignac number, because 31134393 - 2¹ = 31134391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31134391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 946 + ... + 7947.

It is an arithmetic number, because the mean of its divisors is an integer number (3757715).

Almost surely, 2^31134393 is an apocalyptic number.

It is an amenable number.

31134393 is a deficient number, since it is larger than the sum of its proper divisors (13958187).

31134393 is a wasteful number, since it uses less digits than its factorization.

31134393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9288 (or 9285 counting only the distinct ones).

The product of its digits is 2916, while the sum is 27.

The square root of 31134393 is about 5579.8201583922. The cubic root of 31134393 is about 314.5913673352.

The spelling of 31134393 in words is "thirty-one million, one hundred thirty-four thousand, three hundred ninety-three".