442133389 has 2 divisors, whose sum is σ = 442133390. Its totient is φ = 442133388.

The previous prime is 442133383. The next prime is 442133413. The reversal of 442133389 is 983331244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240777289 + 201356100 = 15517^2 + 14190^2 .

It is a cyclic number.

It is not a de Polignac number, because 442133389 - 2⁵ = 442133357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442133383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221066694 + 221066695.

It is an arithmetic number, because the mean of its divisors is an integer number (221066695).

Almost surely, 2^442133389 is an apocalyptic number.

It is an amenable number.

442133389 is a deficient number, since it is larger than the sum of its proper divisors (1).

442133389 is an equidigital number, since it uses as much as digits as its factorization.

442133389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 37.

The square root of 442133389 is about 21026.9681361817. The cubic root of 442133389 is about 761.8177799715.

The spelling of 442133389 in words is "four hundred forty-two million, one hundred thirty-three thousand, three hundred eighty-nine".