442979291 has 4 divisors (see below), whose sum is σ = 443130000. Its totient is φ = 442828584.

The previous prime is 442979279. The next prime is 442979297. The reversal of 442979291 is 192979244.

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 442979291 - 2¹⁰ = 442978267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442979297) 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, 70856 + ... + 76853.

It is an arithmetic number, because the mean of its divisors is an integer number (110782500).

Almost surely, 2^442979291 is an apocalyptic number.

442979291 is a deficient number, since it is larger than the sum of its proper divisors (150709).

442979291 is a wasteful number, since it uses less digits than its factorization.

442979291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150708.

The product of its digits is 326592, while the sum is 47.

The square root of 442979291 is about 21047.0732169582. The cubic root of 442979291 is about 762.3033141714.

Subtracting from 442979291 its sum of digits (47), we obtain a palindrome (442979244).

The spelling of 442979291 in words is "four hundred forty-two million, nine hundred seventy-nine thousand, two hundred ninety-one".