87842811 has 8 divisors (see below), whose sum is σ = 133855744. Its totient is φ = 50195880.

The previous prime is 87842803. The next prime is 87842837. The reversal of 87842811 is 11824878.

It is a happy number.

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

It is not a de Polignac number, because 87842811 - 2³ = 87842803 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87842811.

It is not an unprimeable number, because it can be changed into a prime (87842861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2091475 + ... + 2091516.

It is an arithmetic number, because the mean of its divisors is an integer number (16731968).

Almost surely, 2^87842811 is an apocalyptic number.

87842811 is a deficient number, since it is larger than the sum of its proper divisors (46012933).

87842811 is a wasteful number, since it uses less digits than its factorization.

87842811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183001.

The product of its digits is 28672, while the sum is 39.

The square root of 87842811 is about 9372.4495730839. The cubic root of 87842811 is about 444.5310229921.

The spelling of 87842811 in words is "eighty-seven million, eight hundred forty-two thousand, eight hundred eleven".