42876989 has 4 divisors (see below), whose sum is σ = 42898656. Its totient is φ = 42855324.

The previous prime is 42876979. The next prime is 42877001. The reversal of 42876989 is 98967824.

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 not a de Polignac number, because 42876989 - 2⁴ = 42876973 is a prime.

It is a super-2 number, since 2×42876989² = 3676872371412242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42876989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42876929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7529 + ... + 11934.

It is an arithmetic number, because the mean of its divisors is an integer number (10724664).

Almost surely, 2^42876989 is an apocalyptic number.

It is an amenable number.

42876989 is a deficient number, since it is larger than the sum of its proper divisors (21667).

42876989 is a wasteful number, since it uses less digits than its factorization.

42876989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21666.

The product of its digits is 1741824, while the sum is 53.

The square root of 42876989 is about 6548.0523058387. The cubic root of 42876989 is about 350.0054121612.

The spelling of 42876989 in words is "forty-two million, eight hundred seventy-six thousand, nine hundred eighty-nine".