42989903 has 4 divisors (see below), whose sum is σ = 46898088. Its totient is φ = 39081720.

The previous prime is 42989899. The next prime is 42989917. The reversal of 42989903 is 30998924.

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 42989903 - 2² = 42989899 is a prime.

It is a super-3 number, since 3×42989903³ (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 (42989993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1954076 + ... + 1954097.

It is an arithmetic number, because the mean of its divisors is an integer number (11724522).

Almost surely, 2^42989903 is an apocalyptic number.

42989903 is a deficient number, since it is larger than the sum of its proper divisors (3908185).

42989903 is a wasteful number, since it uses less digits than its factorization.

42989903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3908184.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 42989903 is about 6556.6685900692. The cubic root of 42989903 is about 350.3123823338.

The spelling of 42989903 in words is "forty-two million, nine hundred eighty-nine thousand, nine hundred three".