31084719109 has 2 divisors, whose sum is σ = 31084719110. Its totient is φ = 31084719108.

The previous prime is 31084719089. The next prime is 31084719137. The reversal of 31084719109 is 90191748013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17610617025 + 13474102084 = 132705^2 + 116078^2 .

It is a cyclic number.

It is not a de Polignac number, because 31084719109 - 2⁷ = 31084718981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31084719179) 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, 15542359554 + 15542359555.

It is an arithmetic number, because the mean of its divisors is an integer number (15542359555).

Almost surely, 2^31084719109 is an apocalyptic number.

It is an amenable number.

31084719109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31084719109 is an equidigital number, since it uses as much as digits as its factorization.

31084719109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 43.

The spelling of 31084719109 in words is "thirty-one billion, eighty-four million, seven hundred nineteen thousand, one hundred nine".