87942891 has 8 divisors (see below), whose sum is σ = 117437760. Its totient is φ = 58538312.

The previous prime is 87942889. The next prime is 87942893. The reversal of 87942891 is 19824978.

It is an interprime number because it is at equal distance from previous prime (87942889) and next prime (87942893).

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 87942891 - 2¹ = 87942889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87942891.

It is not an unprimeable number, because it can be changed into a prime (87942893) 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, 20265 + ... + 24218.

It is an arithmetic number, because the mean of its divisors is an integer number (14679720).

Almost surely, 2^87942891 is an apocalyptic number.

87942891 is a deficient number, since it is larger than the sum of its proper divisors (29494869).

87942891 is a wasteful number, since it uses less digits than its factorization.

87942891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45145.

The product of its digits is 290304, while the sum is 48.

The square root of 87942891 is about 9377.7871057089. The cubic root of 87942891 is about 444.6997781413.

The spelling of 87942891 in words is "eighty-seven million, nine hundred forty-two thousand, eight hundred ninety-one".