31393023 has 4 divisors (see below), whose sum is σ = 41857368. Its totient is φ = 20928680.

The previous prime is 31393001. The next prime is 31393027. The reversal of 31393023 is 32039313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32039313 = 3 ⋅10679771.

It is a cyclic number.

It is not a de Polignac number, because 31393023 - 2¹⁰ = 31391999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31392984 and 31393002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31393027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5232168 + ... + 5232173.

It is an arithmetic number, because the mean of its divisors is an integer number (10464342).

Almost surely, 2^31393023 is an apocalyptic number.

31393023 is a deficient number, since it is larger than the sum of its proper divisors (10464345).

31393023 is a wasteful number, since it uses less digits than its factorization.

31393023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10464344.

The product of its (nonzero) digits is 1458, while the sum is 24.

The square root of 31393023 is about 5602.9477063417. The cubic root of 31393023 is about 315.4600584189.

The spelling of 31393023 in words is "thirty-one million, three hundred ninety-three thousand, twenty-three".