31320093 has 32 divisors (see below), whose sum is σ = 49510656. Its totient is φ = 17238528.

The previous prime is 31320083. The next prime is 31320109. The reversal of 31320093 is 39002313.

It is not a de Polignac number, because 31320093 - 2⁵ = 31320061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134305 + ... + 134537.

It is an arithmetic number, because the mean of its divisors is an integer number (1547208).

Almost surely, 2^31320093 is an apocalyptic number.

It is an amenable number.

31320093 is a deficient number, since it is larger than the sum of its proper divisors (18190563).

31320093 is a wasteful number, since it uses less digits than its factorization.

31320093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453.

The product of its (nonzero) digits is 486, while the sum is 21.

The square root of 31320093 is about 5596.4357407193. The cubic root of 31320093 is about 315.2155843439.

The spelling of 31320093 in words is "thirty-one million, three hundred twenty thousand, ninety-three".