42468989 has 4 divisors (see below), whose sum is σ = 43504860. Its totient is φ = 41433120.

The previous prime is 42468973. The next prime is 42468997. The reversal of 42468989 is 98986424.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9406489 + 33062500 = 3067^2 + 5750^2 .

It is a cyclic number.

It is not a de Polignac number, because 42468989 - 2⁴ = 42468973 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 (42468919) 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, 517874 + ... + 517955.

It is an arithmetic number, because the mean of its divisors is an integer number (10876215).

Almost surely, 2^42468989 is an apocalyptic number.

It is an amenable number.

42468989 is a deficient number, since it is larger than the sum of its proper divisors (1035871).

42468989 is a wasteful number, since it uses less digits than its factorization.

42468989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035870.

The product of its digits is 995328, while the sum is 50.

The square root of 42468989 is about 6516.8235360488. The cubic root of 42468989 is about 348.8917023715.

The spelling of 42468989 in words is "forty-two million, four hundred sixty-eight thousand, nine hundred eighty-nine".