42691853 has 4 divisors (see below), whose sum is σ = 42870720. Its totient is φ = 42512988.

The previous prime is 42691801. The next prime is 42691877. The reversal of 42691853 is 35819624.

It is a happy number.

42691853 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42691853 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 (42681853) 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, 89075 + ... + 89552.

It is an arithmetic number, because the mean of its divisors is an integer number (10717680).

Almost surely, 2^42691853 is an apocalyptic number.

It is an amenable number.

42691853 is a deficient number, since it is larger than the sum of its proper divisors (178867).

42691853 is a wasteful number, since it uses less digits than its factorization.

42691853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178866.

The product of its digits is 51840, while the sum is 38.

The square root of 42691853 is about 6533.9002900259. The cubic root of 42691853 is about 349.5009295222.

The spelling of 42691853 in words is "forty-two million, six hundred ninety-one thousand, eight hundred fifty-three".