442959191 has 4 divisors (see below), whose sum is σ = 469015632. Its totient is φ = 416902752.

The previous prime is 442959173. The next prime is 442959199. The reversal of 442959191 is 191959244.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442959191 - 2¹⁴ = 442942807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442959199) 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, 13028195 + ... + 13028228.

It is an arithmetic number, because the mean of its divisors is an integer number (117253908).

Almost surely, 2^442959191 is an apocalyptic number.

442959191 is a deficient number, since it is larger than the sum of its proper divisors (26056441).

442959191 is a wasteful number, since it uses less digits than its factorization.

442959191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26056440.

The product of its digits is 116640, while the sum is 44.

The square root of 442959191 is about 21046.5957104706. The cubic root of 442959191 is about 762.2917842657.

The spelling of 442959191 in words is "four hundred forty-two million, nine hundred fifty-nine thousand, one hundred ninety-one".