442123013 has 2 divisors, whose sum is σ = 442123014. Its totient is φ = 442123012.

The previous prime is 442123001. The next prime is 442123021. The reversal of 442123013 is 310321244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 433555684 + 8567329 = 20822^2 + 2927^2 .

It is a cyclic number.

It is not a de Polignac number, because 442123013 - 2²² = 437928709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442123093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221061506 + 221061507.

It is an arithmetic number, because the mean of its divisors is an integer number (221061507).

Almost surely, 2^442123013 is an apocalyptic number.

It is an amenable number.

442123013 is a deficient number, since it is larger than the sum of its proper divisors (1).

442123013 is an equidigital number, since it uses as much as digits as its factorization.

442123013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 442123013 is about 21026.7214039660. The cubic root of 442123013 is about 761.8118204705.

Adding to 442123013 its reverse (310321244), we get a palindrome (752444257).

The spelling of 442123013 in words is "four hundred forty-two million, one hundred twenty-three thousand, thirteen".