4445423989 has 2 divisors, whose sum is σ = 4445423990. Its totient is φ = 4445423988.

The previous prime is 4445423929. The next prime is 4445424017. The reversal of 4445423989 is 9893245444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2349340900 + 2096083089 = 48470^2 + 45783^2 .

It is a cyclic number.

It is not a de Polignac number, because 4445423989 - 2²³ = 4437035381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4445423909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2222711994 + 2222711995.

It is an arithmetic number, because the mean of its divisors is an integer number (2222711995).

Almost surely, 2^4445423989 is an apocalyptic number.

It is an amenable number.

4445423989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4445423989 is an equidigital number, since it uses as much as digits as its factorization.

4445423989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 52.

The square root of 4445423989 is about 66674.0128460857. The cubic root of 4445423989 is about 1644.2621622448.

The spelling of 4445423989 in words is "four billion, four hundred forty-five million, four hundred twenty-three thousand, nine hundred eighty-nine".