442914217 has 2 divisors, whose sum is σ = 442914218. Its totient is φ = 442914216.

The previous prime is 442914193. The next prime is 442914221. The reversal of 442914217 is 712419244.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259338816 + 183575401 = 16104^2 + 13549^2 .

It is a cyclic number.

It is not a de Polignac number, because 442914217 - 2¹⁵ = 442881449 is a prime.

It is not a weakly prime, because it can be changed into another prime (442914247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221457108 + 221457109.

It is an arithmetic number, because the mean of its divisors is an integer number (221457109).

Almost surely, 2^442914217 is an apocalyptic number.

It is an amenable number.

442914217 is a deficient number, since it is larger than the sum of its proper divisors (1).

442914217 is an equidigital number, since it uses as much as digits as its factorization.

442914217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 442914217 is about 21045.5272445240. The cubic root of 442914217 is about 762.2659846949.

The spelling of 442914217 in words is "four hundred forty-two million, nine hundred fourteen thousand, two hundred seventeen".