4423078421 has 2 divisors, whose sum is σ = 4423078422. Its totient is φ = 4423078420.

The previous prime is 4423078393. The next prime is 4423078441. The reversal of 4423078421 is 1248703244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4412280625 + 10797796 = 66425^2 + 3286^2 .

It is a cyclic number.

It is not a de Polignac number, because 4423078421 - 2¹⁴ = 4423062037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4423078441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2211539210 + 2211539211.

It is an arithmetic number, because the mean of its divisors is an integer number (2211539211).

Almost surely, 2^4423078421 is an apocalyptic number.

It is an amenable number.

4423078421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4423078421 is an equidigital number, since it uses as much as digits as its factorization.

4423078421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 4423078421 is about 66506.2284376433. The cubic root of 4423078421 is about 1641.5024924139.

The spelling of 4423078421 in words is "four billion, four hundred twenty-three million, seventy-eight thousand, four hundred twenty-one".