31290093 has 24 divisors (see below), whose sum is σ = 48746880. Its totient is φ = 19275840.

The previous prime is 31290089. The next prime is 31290167. The reversal of 31290093 is 39009213.

It is not a de Polignac number, because 31290093 - 2² = 31290089 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31290023) 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 23 ways as a sum of consecutive naturals, for example, 4780 + ... + 9242.

It is an arithmetic number, because the mean of its divisors is an integer number (2031120).

Almost surely, 2^31290093 is an apocalyptic number.

It is an amenable number.

31290093 is a deficient number, since it is larger than the sum of its proper divisors (17456787).

31290093 is a wasteful number, since it uses less digits than its factorization.

31290093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529 (or 4526 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 31290093 is about 5593.7548212270. The cubic root of 31290093 is about 315.1149089465.

The spelling of 31290093 in words is "thirty-one million, two hundred ninety thousand, ninety-three".