331334543989 has 2 divisors, whose sum is σ = 331334543990. Its totient is φ = 331334543988.

The previous prime is 331334543983. The next prime is 331334544019. The reversal of 331334543989 is 989345433133.

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., 305880894225 + 25453649764 = 553065^2 + 159542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331334543989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331334543983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165667271994 + 165667271995.

It is an arithmetic number, because the mean of its divisors is an integer number (165667271995).

Almost surely, 2^331334543989 is an apocalyptic number.

It is an amenable number.

331334543989 is a deficient number, since it is larger than the sum of its proper divisors (1).

331334543989 is an equidigital number, since it uses as much as digits as its factorization.

331334543989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12597120, while the sum is 55.

The spelling of 331334543989 in words is "three hundred thirty-one billion, three hundred thirty-four million, five hundred forty-three thousand, nine hundred eighty-nine".