31012117 has 2 divisors, whose sum is σ = 31012118. Its totient is φ = 31012116.

The previous prime is 31012099. The next prime is 31012127. The reversal of 31012117 is 71121013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24990001 + 6022116 = 4999^2 + 2454^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012117 - 2¹⁹ = 30487829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31012117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31012127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506058 + 15506059.

It is an arithmetic number, because the mean of its divisors is an integer number (15506059).

Almost surely, 2^31012117 is an apocalyptic number.

It is an amenable number.

31012117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012117 is an equidigital number, since it uses as much as digits as its factorization.

31012117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 31012117 is about 5568.8523952427. The cubic root of 31012117 is about 314.1789890575.

The spelling of 31012117 in words is "thirty-one million, twelve thousand, one hundred seventeen".