442001407 has 2 divisors, whose sum is σ = 442001408. Its totient is φ = 442001406.

The previous prime is 442001381. The next prime is 442001423. The reversal of 442001407 is 704100244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442001407 - 2¹⁹ = 441477119 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 (442001447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221000703 + 221000704.

It is an arithmetic number, because the mean of its divisors is an integer number (221000704).

Almost surely, 2^442001407 is an apocalyptic number.

442001407 is a deficient number, since it is larger than the sum of its proper divisors (1).

442001407 is an equidigital number, since it uses as much as digits as its factorization.

442001407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 442001407 is about 21023.8295036846. The cubic root of 442001407 is about 761.7419685813.

The spelling of 442001407 in words is "four hundred forty-two million, one thousand, four hundred seven".