842638089 has 8 divisors (see below), whose sum is σ = 1124079840. Its totient is φ = 561477536.

The previous prime is 842638067. The next prime is 842638103. The reversal of 842638089 is 980836248.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 842638089 - 2⁵ = 842638057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (842638789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63204 + ... + 75365.

It is an arithmetic number, because the mean of its divisors is an integer number (140509980).

Almost surely, 2^842638089 is an apocalyptic number.

It is an amenable number.

842638089 is a deficient number, since it is larger than the sum of its proper divisors (281441751).

842638089 is a wasteful number, since it uses less digits than its factorization.

842638089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140599.

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 842638089 is about 29028.2291743744. The cubic root of 842638089 is about 944.5255175212.

The spelling of 842638089 in words is "eight hundred forty-two million, six hundred thirty-eight thousand, eighty-nine".