442312729 has 2 divisors, whose sum is σ = 442312730. Its totient is φ = 442312728.

The previous prime is 442312711. The next prime is 442312753. The reversal of 442312729 is 927213244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383376400 + 58936329 = 19580^2 + 7677^2 .

It is a cyclic number.

It is not a de Polignac number, because 442312729 - 2⁷ = 442312601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442312694 and 442312703.

It is not a weakly prime, because it can be changed into another prime (442312709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221156364 + 221156365.

It is an arithmetic number, because the mean of its divisors is an integer number (221156365).

Almost surely, 2^442312729 is an apocalyptic number.

It is an amenable number.

442312729 is a deficient number, since it is larger than the sum of its proper divisors (1).

442312729 is an equidigital number, since it uses as much as digits as its factorization.

442312729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 442312729 is about 21031.2322273328. The cubic root of 442312729 is about 761.9207699556.

The spelling of 442312729 in words is "four hundred forty-two million, three hundred twelve thousand, seven hundred twenty-nine".