442093989 has 4 divisors (see below), whose sum is σ = 589458656. Its totient is φ = 294729324.

The previous prime is 442093987. The next prime is 442093991. The reversal of 442093989 is 989390244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (442093987) and next prime (442093991).

It is not a de Polignac number, because 442093989 - 2¹ = 442093987 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442093987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73682329 + ... + 73682334.

It is an arithmetic number, because the mean of its divisors is an integer number (147364664).

Almost surely, 2^442093989 is an apocalyptic number.

It is an amenable number.

442093989 is a deficient number, since it is larger than the sum of its proper divisors (147364667).

442093989 is a wasteful number, since it uses less digits than its factorization.

442093989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147364666.

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 442093989 is about 21026.0312232242. The cubic root of 442093989 is about 761.7951499139.

The spelling of 442093989 in words is "four hundred forty-two million, ninety-three thousand, nine hundred eighty-nine".