442791691 has 8 divisors (see below), whose sum is σ = 470441520. Its totient is φ = 415967328.

The previous prime is 442791689. The next prime is 442791721. The reversal of 442791691 is 196197244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442791691 - 2¹ = 442791689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442791611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205261 + ... + 207406.

It is an arithmetic number, because the mean of its divisors is an integer number (58805190).

Almost surely, 2^442791691 is an apocalyptic number.

442791691 is a deficient number, since it is larger than the sum of its proper divisors (27649829).

442791691 is a wasteful number, since it uses less digits than its factorization.

442791691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412733.

The product of its digits is 108864, while the sum is 43.

The square root of 442791691 is about 21042.6160683504. The cubic root of 442791691 is about 762.1956881513.

The spelling of 442791691 in words is "four hundred forty-two million, seven hundred ninety-one thousand, six hundred ninety-one".