42891803 has 4 divisors (see below), whose sum is σ = 44756688. Its totient is φ = 41026920.

The previous prime is 42891791. The next prime is 42891811. The reversal of 42891803 is 30819824.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42891803 - 2²⁰ = 41843227 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (42891853) 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, 932408 + ... + 932453.

It is an arithmetic number, because the mean of its divisors is an integer number (11189172).

Almost surely, 2^42891803 is an apocalyptic number.

42891803 is a deficient number, since it is larger than the sum of its proper divisors (1864885).

42891803 is a wasteful number, since it uses less digits than its factorization.

42891803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864884.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 42891803 is about 6549.1833842091. The cubic root of 42891803 is about 350.0457164773.

The spelling of 42891803 in words is "forty-two million, eight hundred ninety-one thousand, eight hundred three".