31140593 has 4 divisors (see below), whose sum is σ = 33971568. Its totient is φ = 28309620.

The previous prime is 31140547. The next prime is 31140611. The reversal of 31140593 is 39504113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39504113 = 11 ⋅3591283.

It is a cyclic number.

It is not a de Polignac number, because 31140593 - 2²⁰ = 30092017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31140503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415471 + ... + 1415492.

It is an arithmetic number, because the mean of its divisors is an integer number (8492892).

Almost surely, 2^31140593 is an apocalyptic number.

It is an amenable number.

31140593 is a deficient number, since it is larger than the sum of its proper divisors (2830975).

31140593 is a wasteful number, since it uses less digits than its factorization.

31140593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830974.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 31140593 is about 5580.3757041977. The cubic root of 31140593 is about 314.6122481772.

It can be divided in two parts, 311 and 40593, that added together give a palindrome (40904).

The spelling of 31140593 in words is "thirty-one million, one hundred forty thousand, five hundred ninety-three".