31114309 has 2 divisors, whose sum is σ = 31114310. Its totient is φ = 31114308.

The previous prime is 31114289. The next prime is 31114319. The reversal of 31114309 is 90341113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31114084 + 225 = 5578^2 + 15^2 .

It is an emirp because it is prime and its reverse (90341113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31114309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31114309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31114319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15557154 + 15557155.

It is an arithmetic number, because the mean of its divisors is an integer number (15557155).

Almost surely, 2^31114309 is an apocalyptic number.

It is an amenable number.

31114309 is a deficient number, since it is larger than the sum of its proper divisors (1).

31114309 is an equidigital number, since it uses as much as digits as its factorization.

31114309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 31114309 is about 5578.0201684827. The cubic root of 31114309 is about 314.5237078384.

The spelling of 31114309 in words is "thirty-one million, one hundred fourteen thousand, three hundred nine".