42689471 has 4 divisors (see below), whose sum is σ = 46570344. Its totient is φ = 38808600.

The previous prime is 42689461. The next prime is 42689503. The reversal of 42689471 is 17498624.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42689471 is a prime.

It is a super-3 number, since 3×42689471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42689441) 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, 1940420 + ... + 1940441.

It is an arithmetic number, because the mean of its divisors is an integer number (11642586).

Almost surely, 2^42689471 is an apocalyptic number.

42689471 is a deficient number, since it is larger than the sum of its proper divisors (3880873).

42689471 is a wasteful number, since it uses less digits than its factorization.

42689471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880872.

The product of its digits is 96768, while the sum is 41.

The square root of 42689471 is about 6533.7180073829. The cubic root of 42689471 is about 349.4944292445.

The spelling of 42689471 in words is "forty-two million, six hundred eighty-nine thousand, four hundred seventy-one".