31444029989 has 2 divisors, whose sum is σ = 31444029990. Its totient is φ = 31444029988.

The previous prime is 31444029913. The next prime is 31444030049. The reversal of 31444029989 is 98992044413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26514585889 + 4929444100 = 162833^2 + 70210^2 .

It is a cyclic number.

It is not a de Polignac number, because 31444029989 - 2²⁸ = 31175594533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31444029989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31444020989) 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, 15722014994 + 15722014995.

It is an arithmetic number, because the mean of its divisors is an integer number (15722014995).

Almost surely, 2^31444029989 is an apocalyptic number.

It is an amenable number.

31444029989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31444029989 is an equidigital number, since it uses as much as digits as its factorization.

31444029989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The spelling of 31444029989 in words is "thirty-one billion, four hundred forty-four million, twenty-nine thousand, nine hundred eighty-nine".