842881087 has 4 divisors (see below), whose sum is σ = 845626936. Its totient is φ = 840135240.

The previous prime is 842881043. The next prime is 842881121. The reversal of 842881087 is 780188248.

It is a happy number.

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 842881087 - 2⁷ = 842880959 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 (842881037) 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, 1372464 + ... + 1373077.

It is an arithmetic number, because the mean of its divisors is an integer number (211406734).

Almost surely, 2^842881087 is an apocalyptic number.

842881087 is a deficient number, since it is larger than the sum of its proper divisors (2745849).

842881087 is a wasteful number, since it uses less digits than its factorization.

842881087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745848.

The product of its (nonzero) digits is 229376, while the sum is 46.

The square root of 842881087 is about 29032.4144190593. The cubic root of 842881087 is about 944.6163021477.

The spelling of 842881087 in words is "eight hundred forty-two million, eight hundred eighty-one thousand, eighty-seven".