31430828189 has 2 divisors, whose sum is σ = 31430828190. Its totient is φ = 31430828188.

The previous prime is 31430828179. The next prime is 31430828207. The reversal of 31430828189 is 98182803413.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24464088100 + 6966740089 = 156410^2 + 83467^2 .

It is an emirp because it is prime and its reverse (98182803413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31430828189 - 2²⁸ = 31162392733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31430828119) 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, 15715414094 + 15715414095.

It is an arithmetic number, because the mean of its divisors is an integer number (15715414095).

Almost surely, 2^31430828189 is an apocalyptic number.

It is an amenable number.

31430828189 is a deficient number, since it is larger than the sum of its proper divisors (1).

31430828189 is an equidigital number, since it uses as much as digits as its factorization.

31430828189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 31430828189 in words is "thirty-one billion, four hundred thirty million, eight hundred twenty-eight thousand, one hundred eighty-nine".