31312093 has 4 divisors (see below), whose sum is σ = 31825468. Its totient is φ = 30798720.

The previous prime is 31312091. The next prime is 31312097. The reversal of 31312093 is 39021313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39021313 = 199 ⋅196087.

It can be written as a sum of positive squares in 2 ways, for example, as 5890329 + 25421764 = 2427^2 + 5042^2 .

It is a cyclic number.

It is not a de Polignac number, because 31312093 - 2¹ = 31312091 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312091) 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, 256596 + ... + 256717.

It is an arithmetic number, because the mean of its divisors is an integer number (7956367).

Almost surely, 2^31312093 is an apocalyptic number.

It is an amenable number.

31312093 is a deficient number, since it is larger than the sum of its proper divisors (513375).

31312093 is an equidigital number, since it uses as much as digits as its factorization.

31312093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513374.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 31312093 is about 5595.7209544437. The cubic root of 31312093 is about 315.1887438595.

The spelling of 31312093 in words is "thirty-one million, three hundred twelve thousand, ninety-three".