3438421072789 has 2 divisors, whose sum is σ = 3438421072790. Its totient is φ = 3438421072788.

The previous prime is 3438421072777. The next prime is 3438421072859. The reversal of 3438421072789 is 9872701248343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2590355053764 + 848066019025 = 1609458^2 + 920905^2 .

It is a cyclic number.

It is not a de Polignac number, because 3438421072789 - 2³⁷ = 3300982119317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3438421072739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1719210536394 + 1719210536395.

It is an arithmetic number, because the mean of its divisors is an integer number (1719210536395).

Almost surely, 2^{3438421072789} is an apocalyptic number.

It is an amenable number.

3438421072789 is a deficient number, since it is larger than the sum of its proper divisors (1).

3438421072789 is an equidigital number, since it uses as much as digits as its factorization.

3438421072789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16257024, while the sum is 58.

The spelling of 3438421072789 in words is "three trillion, four hundred thirty-eight billion, four hundred twenty-one million, seventy-two thousand, seven hundred eighty-nine".