442313661 has 8 divisors (see below), whose sum is σ = 590384704. Its totient is φ = 294559200.

The previous prime is 442313657. The next prime is 442313671. The reversal of 442313661 is 166313244.

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

It is not a de Polignac number, because 442313661 - 2² = 442313657 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 (442313671) 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, 75865 + ... + 81486.

It is an arithmetic number, because the mean of its divisors is an integer number (73798088).

Almost surely, 2^442313661 is an apocalyptic number.

It is an amenable number.

442313661 is a deficient number, since it is larger than the sum of its proper divisors (148071043).

442313661 is a wasteful number, since it uses less digits than its factorization.

442313661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158291.

The product of its digits is 10368, while the sum is 30.

The square root of 442313661 is about 21031.2543848435. The cubic root of 442313661 is about 761.9213051046.

The spelling of 442313661 in words is "four hundred forty-two million, three hundred thirteen thousand, six hundred sixty-one".