87291281881 has 8 divisors (see below), whose sum is σ = 88757497728. Its totient is φ = 85826202000.

The previous prime is 87291281827. The next prime is 87291281939. The reversal of 87291281881 is 18818219278.

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 87291281881 - 2²⁷ = 87157064153 is a prime.

It is a super-2 number, since 2×87291281881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87291281381) 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, 128305 + ... + 437086.

It is an arithmetic number, because the mean of its divisors is an integer number (11094687216).

Almost surely, 2^87291281881 is an apocalyptic number.

It is an amenable number.

87291281881 is a deficient number, since it is larger than the sum of its proper divisors (1466215847).

87291281881 is a wasteful number, since it uses less digits than its factorization.

87291281881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567983.

The product of its digits is 1032192, while the sum is 55.

The spelling of 87291281881 in words is "eighty-seven billion, two hundred ninety-one million, two hundred eighty-one thousand, eight hundred eighty-one".