442289233 has 2 divisors, whose sum is σ = 442289234. Its totient is φ = 442289232.

The previous prime is 442289213. The next prime is 442289249. The reversal of 442289233 is 332982244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345699649 + 96589584 = 18593^2 + 9828^2 .

It is a cyclic number.

It is not a de Polignac number, because 442289233 - 2¹⁷ = 442158161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442289192 and 442289201.

It is not a weakly prime, because it can be changed into another prime (442289203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221144616 + 221144617.

It is an arithmetic number, because the mean of its divisors is an integer number (221144617).

Almost surely, 2^442289233 is an apocalyptic number.

It is an amenable number.

442289233 is a deficient number, since it is larger than the sum of its proper divisors (1).

442289233 is an equidigital number, since it uses as much as digits as its factorization.

442289233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 37.

The square root of 442289233 is about 21030.6736221168. The cubic root of 442289233 is about 761.9072784399.

The spelling of 442289233 in words is "four hundred forty-two million, two hundred eighty-nine thousand, two hundred thirty-three".