2443430121989 has 2 divisors, whose sum is σ = 2443430121990. Its totient is φ = 2443430121988.

The previous prime is 2443430121983. The next prime is 2443430122013. The reversal of 2443430121989 is 9891210343442.

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., 2070649050625 + 372781071364 = 1438975^2 + 610558^2 .

It is a cyclic number.

It is not a de Polignac number, because 2443430121989 - 2¹² = 2443430117893 is a prime.

It is a super-2 number, since 2×2443430121989² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2443430121983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1221715060994 + 1221715060995.

It is an arithmetic number, because the mean of its divisors is an integer number (1221715060995).

Almost surely, 2^{2443430121989} is an apocalyptic number.

It is an amenable number.

2443430121989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2443430121989 is an equidigital number, since it uses as much as digits as its factorization.

2443430121989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 2443430121989 in words is "two trillion, four hundred forty-three billion, four hundred thirty million, one hundred twenty-one thousand, nine hundred eighty-nine".