442691693 has 4 divisors (see below), whose sum is σ = 443878908. Its totient is φ = 441504480.

The previous prime is 442691681. The next prime is 442691707. The reversal of 442691693 is 396196244.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 247055524 + 195636169 = 15718^2 + 13987^2 .

It is a cyclic number.

It is not a de Polignac number, because 442691693 - 2⁴ = 442691677 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 (442691593) 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, 593048 + ... + 593793.

It is an arithmetic number, because the mean of its divisors is an integer number (110969727).

Almost surely, 2^442691693 is an apocalyptic number.

It is an amenable number.

442691693 is a deficient number, since it is larger than the sum of its proper divisors (1187215).

442691693 is a wasteful number, since it uses less digits than its factorization.

442691693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187214.

The product of its digits is 279936, while the sum is 44.

The square root of 442691693 is about 21040.2398512945. The cubic root of 442691693 is about 762.1383069310.

The spelling of 442691693 in words is "four hundred forty-two million, six hundred ninety-one thousand, six hundred ninety-three".