87943881 has 8 divisors (see below), whose sum is σ = 122356800. Its totient is φ = 56080112.

The previous prime is 87943861. The next prime is 87943897. The reversal of 87943881 is 18834978.

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 87943881 - 2¹⁰ = 87942857 is a prime.

It is a super-2 number, since 2×87943881² = 15468252410684322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87943881.

It is not an unprimeable number, because it can be changed into a prime (87943861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637206 + ... + 637343.

It is an arithmetic number, because the mean of its divisors is an integer number (15294600).

Almost surely, 2^87943881 is an apocalyptic number.

It is an amenable number.

87943881 is a deficient number, since it is larger than the sum of its proper divisors (34412919).

87943881 is a wasteful number, since it uses less digits than its factorization.

87943881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274575.

The product of its digits is 387072, while the sum is 48.

The square root of 87943881 is about 9377.8398898680. The cubic root of 87943881 is about 444.7014468421.

The spelling of 87943881 in words is "eighty-seven million, nine hundred forty-three thousand, eight hundred eighty-one".