331312451389 has 2 divisors, whose sum is σ = 331312451390. Its totient is φ = 331312451388.

The previous prime is 331312451311. The next prime is 331312451399. The reversal of 331312451389 is 983154213133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201189925764 + 130122525625 = 448542^2 + 360725^2 .

It is a cyclic number.

It is not a de Polignac number, because 331312451389 - 2⁹ = 331312450877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331312451399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165656225694 + 165656225695.

It is an arithmetic number, because the mean of its divisors is an integer number (165656225695).

Almost surely, 2^331312451389 is an apocalyptic number.

It is an amenable number.

331312451389 is a deficient number, since it is larger than the sum of its proper divisors (1).

331312451389 is an equidigital number, since it uses as much as digits as its factorization.

331312451389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The spelling of 331312451389 in words is "three hundred thirty-one billion, three hundred twelve million, four hundred fifty-one thousand, three hundred eighty-nine".