84438267323989 has 2 divisors, whose sum is σ = 84438267323990. Its totient is φ = 84438267323988.

The previous prime is 84438267323981. The next prime is 84438267324023. The reversal of 84438267323989 is 98932376283448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83664864922500 + 773402401489 = 9146850^2 + 879433^2 .

It is a cyclic number.

It is not a de Polignac number, because 84438267323989 - 2³ = 84438267323981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84438267323981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42219133661994 + 42219133661995.

It is an arithmetic number, because the mean of its divisors is an integer number (42219133661995).

Almost surely, 2^{84438267323989} is an apocalyptic number.

It is an amenable number.

84438267323989 is a deficient number, since it is larger than the sum of its proper divisors (1).

84438267323989 is an equidigital number, since it uses as much as digits as its factorization.

84438267323989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3009871872, while the sum is 76.

The spelling of 84438267323989 in words is "eighty-four trillion, four hundred thirty-eight billion, two hundred sixty-seven million, three hundred twenty-three thousand, nine hundred eighty-nine".