31092085309 has 2 divisors, whose sum is σ = 31092085310. Its totient is φ = 31092085308.

The previous prime is 31092085289. The next prime is 31092085333. The reversal of 31092085309 is 90358029013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30889820025 + 202265284 = 175755^2 + 14222^2 .

It is a cyclic number.

It is not a de Polignac number, because 31092085309 - 2⁹ = 31092084797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31092082309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15546042654 + 15546042655.

It is an arithmetic number, because the mean of its divisors is an integer number (15546042655).

Almost surely, 2^31092085309 is an apocalyptic number.

It is an amenable number.

31092085309 is a deficient number, since it is larger than the sum of its proper divisors (1).

31092085309 is an equidigital number, since it uses as much as digits as its factorization.

31092085309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 31092085309 in words is "thirty-one billion, ninety-two million, eighty-five thousand, three hundred nine".