442293391 has 2 divisors, whose sum is σ = 442293392. Its totient is φ = 442293390.

The previous prime is 442293377. The next prime is 442293431. The reversal of 442293391 is 193392244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442293391 - 2⁷ = 442293263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442293391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442293311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221146695 + 221146696.

It is an arithmetic number, because the mean of its divisors is an integer number (221146696).

Almost surely, 2^442293391 is an apocalyptic number.

442293391 is a deficient number, since it is larger than the sum of its proper divisors (1).

442293391 is an equidigital number, since it uses as much as digits as its factorization.

442293391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 442293391 is about 21030.7724774912. The cubic root of 442293391 is about 761.9096660182.

The spelling of 442293391 in words is "four hundred forty-two million, two hundred ninety-three thousand, three hundred ninety-one".