87881387 has 8 divisors (see below), whose sum is σ = 95940912. Its totient is φ = 79833600.

The previous prime is 87881377. The next prime is 87881389. The reversal of 87881387 is 78318878.

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

It is not a de Polignac number, because 87881387 - 2⁴ = 87881371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87881389) 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 7 ways as a sum of consecutive naturals, for example, 21923 + ... + 25619.

It is an arithmetic number, because the mean of its divisors is an integer number (11992614).

Almost surely, 2^87881387 is an apocalyptic number.

87881387 is a deficient number, since it is larger than the sum of its proper divisors (8059525).

87881387 is a wasteful number, since it uses less digits than its factorization.

87881387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869.

The product of its digits is 602112, while the sum is 50.

The square root of 87881387 is about 9374.5072937195. The cubic root of 87881387 is about 444.5960851144.

The spelling of 87881387 in words is "eighty-seven million, eight hundred eighty-one thousand, three hundred eighty-seven".