2311308447989 has 2 divisors, whose sum is σ = 2311308447990. Its totient is φ = 2311308447988.

The previous prime is 2311308447883. The next prime is 2311308447997. The reversal of 2311308447989 is 9897448031132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1902904373764 + 408404074225 = 1379458^2 + 639065^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311308447989 - 2⁸ = 2311308447733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2311308447689) 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, 1155654223994 + 1155654223995.

It is an arithmetic number, because the mean of its divisors is an integer number (1155654223995).

Almost surely, 2^{2311308447989} is an apocalyptic number.

It is an amenable number.

2311308447989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311308447989 is an equidigital number, since it uses as much as digits as its factorization.

2311308447989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 2311308447989 in words is "two trillion, three hundred eleven billion, three hundred eight million, four hundred forty-seven thousand, nine hundred eighty-nine".