331004389 has 2 divisors, whose sum is σ = 331004390. Its totient is φ = 331004388.

The previous prime is 331004383. The next prime is 331004407. The reversal of 331004389 is 983400133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231344100 + 99660289 = 15210^2 + 9983^2 .

It is an emirp because it is prime and its reverse (983400133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331004389 - 2⁹ = 331003877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331004389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331004383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165502194 + 165502195.

It is an arithmetic number, because the mean of its divisors is an integer number (165502195).

Almost surely, 2^331004389 is an apocalyptic number.

It is an amenable number.

331004389 is a deficient number, since it is larger than the sum of its proper divisors (1).

331004389 is an equidigital number, since it uses as much as digits as its factorization.

331004389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 331004389 is about 18193.5260188892. The cubic root of 331004389 is about 691.7426990948.

The spelling of 331004389 in words is "three hundred thirty-one million, four thousand, three hundred eighty-nine".