31090586090209 has 2 divisors, whose sum is σ = 31090586090210. Its totient is φ = 31090586090208.

The previous prime is 31090586090173. The next prime is 31090586090261. The reversal of 31090586090209 is 90209068509013.

It is an a-pointer prime, because the next prime (31090586090261) can be obtained adding 31090586090209 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30496106539584 + 594479550625 = 5522328^2 + 771025^2 .

It is a cyclic number.

It is not a de Polignac number, because 31090586090209 - 2⁹ = 31090586089697 is a prime.

It is not a weakly prime, because it can be changed into another prime (31090586090269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15545293045104 + 15545293045105.

It is an arithmetic number, because the mean of its divisors is an integer number (15545293045105).

Almost surely, 2^{31090586090209} is an apocalyptic number.

It is an amenable number.

31090586090209 is a deficient number, since it is larger than the sum of its proper divisors (1).

31090586090209 is an equidigital number, since it uses as much as digits as its factorization.

31090586090209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The spelling of 31090586090209 in words is "thirty-one trillion, ninety billion, five hundred eighty-six million, ninety thousand, two hundred nine".