4021430342389 has 2 divisors, whose sum is σ = 4021430342390. Its totient is φ = 4021430342388.

The previous prime is 4021430342381. The next prime is 4021430342407. The reversal of 4021430342389 is 9832430341204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2683591119889 + 1337839222500 = 1638167^2 + 1156650^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021430342389 - 2³ = 4021430342381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021430342381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010715171194 + 2010715171195.

It is an arithmetic number, because the mean of its divisors is an integer number (2010715171195).

Almost surely, 2^{4021430342389} is an apocalyptic number.

It is an amenable number.

4021430342389 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021430342389 is an equidigital number, since it uses as much as digits as its factorization.

4021430342389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 4021430342389 in words is "four trillion, twenty-one billion, four hundred thirty million, three hundred forty-two thousand, three hundred eighty-nine".