31104971 has 2 divisors, whose sum is σ = 31104972. Its totient is φ = 31104970.

The previous prime is 31104961. The next prime is 31104973. The reversal of 31104971 is 17940113.

It is a strong prime.

It is an emirp because it is prime and its reverse (17940113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31104971 is a prime.

Together with 31104973, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31104971.

It is not a weakly prime, because it can be changed into another prime (31104973) 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, 15552485 + 15552486.

It is an arithmetic number, because the mean of its divisors is an integer number (15552486).

Almost surely, 2^31104971 is an apocalyptic number.

31104971 is a deficient number, since it is larger than the sum of its proper divisors (1).

31104971 is an equidigital number, since it uses as much as digits as its factorization.

31104971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 31104971 is about 5577.1830703322. The cubic root of 31104971 is about 314.4922398275.

The spelling of 31104971 in words is "thirty-one million, one hundred four thousand, nine hundred seventy-one".