31000093 has 4 divisors (see below), whose sum is σ = 32000128. Its totient is φ = 30000060.

The previous prime is 31000087. The next prime is 31000127. The reversal of 31000093 is 39000013.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31000093 is a prime.

It is a super-2 number, since 2×31000093² = 1922011532017298, which contains 22 as substring.

It is a Duffinian number.

31000093 is a modest number, since divided by 93 gives 31 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000003) 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, 499971 + ... + 500032.

It is an arithmetic number, because the mean of its divisors is an integer number (8000032).

Almost surely, 2^31000093 is an apocalyptic number.

It is an amenable number.

31000093 is a deficient number, since it is larger than the sum of its proper divisors (1000035).

31000093 is a wasteful number, since it uses less digits than its factorization.

31000093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000034.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 31000093 is about 5567.7727144703. The cubic root of 31000093 is about 314.1383793769.

The spelling of 31000093 in words is "thirty-one million, ninety-three", and thus it is an aban number and an uban number.