31200320089 has 2 divisors, whose sum is σ = 31200320090. Its totient is φ = 31200320088.

The previous prime is 31200319981. The next prime is 31200320113. The reversal of 31200320089 is 98002300213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20680740864 + 10519579225 = 143808^2 + 102565^2 .

It is a cyclic number.

It is not a de Polignac number, because 31200320089 - 2³¹ = 29052836441 is a prime.

It is not a weakly prime, because it can be changed into another prime (31200329089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600160044 + 15600160045.

It is an arithmetic number, because the mean of its divisors is an integer number (15600160045).

Almost surely, 2^31200320089 is an apocalyptic number.

It is an amenable number.

31200320089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31200320089 is an equidigital number, since it uses as much as digits as its factorization.

31200320089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 31200320089 in words is "thirty-one billion, two hundred million, three hundred twenty thousand, eighty-nine".