31031093 has 4 divisors (see below), whose sum is σ = 32032128. Its totient is φ = 30030060.

The previous prime is 31031083. The next prime is 31031201. The reversal of 31031093 is 39013013.

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: 39013013 = 13 ⋅3001001.

It is a cyclic number.

It is not a de Polignac number, because 31031093 - 2⁶ = 31031029 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 (31031003) 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, 500471 + ... + 500532.

It is an arithmetic number, because the mean of its divisors is an integer number (8008032).

Almost surely, 2^31031093 is an apocalyptic number.

It is an amenable number.

31031093 is a deficient number, since it is larger than the sum of its proper divisors (1001035).

31031093 is a wasteful number, since it uses less digits than its factorization.

31031093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001034.

The product of its (nonzero) digits is 243, while the sum is 20.

The square root of 31031093 is about 5570.5558968563. Note that the first 3 decimals coincide. The cubic root of 31031093 is about 314.2430569712.

The spelling of 31031093 in words is "thirty-one million, thirty-one thousand, ninety-three".