442990123 has 2 divisors, whose sum is σ = 442990124. Its totient is φ = 442990122.

The previous prime is 442990057. The next prime is 442990127. The reversal of 442990123 is 321099244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442990123 - 2⁹ = 442989611 is a prime.

It is not a weakly prime, because it can be changed into another prime (442990127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221495061 + 221495062.

It is an arithmetic number, because the mean of its divisors is an integer number (221495062).

Almost surely, 2^442990123 is an apocalyptic number.

442990123 is a deficient number, since it is larger than the sum of its proper divisors (1).

442990123 is an equidigital number, since it uses as much as digits as its factorization.

442990123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 442990123 is about 21047.3305433254. The cubic root of 442990123 is about 762.3095275561.

The spelling of 442990123 in words is "four hundred forty-two million, nine hundred ninety thousand, one hundred twenty-three".