43012011323989 has 2 divisors, whose sum is σ = 43012011323990. Its totient is φ = 43012011323988.

The previous prime is 43012011323959. The next prime is 43012011324049. The reversal of 43012011323989 is 98932311021034.

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., 22309893522225 + 20702117801764 = 4723335^2 + 4549958^2 .

It is a cyclic number.

It is not a de Polignac number, because 43012011323989 - 2¹¹ = 43012011321941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43012011323959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21506005661994 + 21506005661995.

It is an arithmetic number, because the mean of its divisors is an integer number (21506005661995).

Almost surely, 2^{43012011323989} is an apocalyptic number.

It is an amenable number.

43012011323989 is a deficient number, since it is larger than the sum of its proper divisors (1).

43012011323989 is an equidigital number, since it uses as much as digits as its factorization.

43012011323989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 43012011323989 in words is "forty-three trillion, twelve billion, eleven million, three hundred twenty-three thousand, nine hundred eighty-nine".