31382123 has 2 divisors, whose sum is σ = 31382124. Its totient is φ = 31382122.

The previous prime is 31382111. The next prime is 31382171. The reversal of 31382123 is 32128313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31382123 - 2⁴ = 31382107 is a prime.

It is not a weakly prime, because it can be changed into another prime (31382173) 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 as a sum of consecutive naturals, namely, 15691061 + 15691062.

It is an arithmetic number, because the mean of its divisors is an integer number (15691062).

Almost surely, 2^31382123 is an apocalyptic number.

31382123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31382123 is an equidigital number, since it uses as much as digits as its factorization.

31382123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 31382123 is about 5601.9749196154. The cubic root of 31382123 is about 315.4235438014.

The spelling of 31382123 in words is "thirty-one million, three hundred eighty-two thousand, one hundred twenty-three".