442133729 has 2 divisors, whose sum is σ = 442133730. Its totient is φ = 442133728.

The previous prime is 442133719. The next prime is 442133753. The reversal of 442133729 is 927331244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435682129 + 6451600 = 20873^2 + 2540^2 .

It is a cyclic number.

It is not a de Polignac number, because 442133729 - 2²⁴ = 425356513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (442133719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221066864 + 221066865.

It is an arithmetic number, because the mean of its divisors is an integer number (221066865).

Almost surely, 2^442133729 is an apocalyptic number.

It is an amenable number.

442133729 is a deficient number, since it is larger than the sum of its proper divisors (1).

442133729 is an equidigital number, since it uses as much as digits as its factorization.

442133729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 442133729 is about 21026.9762210357. The cubic root of 442133729 is about 761.8179752505.

The spelling of 442133729 in words is "four hundred forty-two million, one hundred thirty-three thousand, seven hundred twenty-nine".