42668893 has 4 divisors (see below), whose sum is σ = 42915708. Its totient is φ = 42422080.

The previous prime is 42668891. The next prime is 42668917. The reversal of 42668893 is 39886624.

It is a happy number.

42668893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40934404 + 1734489 = 6398^2 + 1317^2 .

It is a cyclic number.

It is not a de Polignac number, because 42668893 - 2¹ = 42668891 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 (42668891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123148 + ... + 123493.

It is an arithmetic number, because the mean of its divisors is an integer number (10728927).

Almost surely, 2^42668893 is an apocalyptic number.

It is an amenable number.

42668893 is a deficient number, since it is larger than the sum of its proper divisors (246815).

42668893 is a wasteful number, since it uses less digits than its factorization.

42668893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246814.

The product of its digits is 497664, while the sum is 46.

The square root of 42668893 is about 6532.1430633445. The cubic root of 42668893 is about 349.4382635429.

The spelling of 42668893 in words is "forty-two million, six hundred sixty-eight thousand, eight hundred ninety-three".