87178851 has 12 divisors (see below), whose sum is σ = 129987520. Its totient is φ = 56244240.

The previous prime is 87178829. The next prime is 87178853. The reversal of 87178851 is 15887178.

It is not a de Polignac number, because 87178851 - 2⁷ = 87178723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87178797 and 87178806.

It is not an unprimeable number, because it can be changed into a prime (87178853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155956 + ... + 156513.

Almost surely, 2^87178851 is an apocalyptic number.

87178851 is a deficient number, since it is larger than the sum of its proper divisors (42808669).

87178851 is a wasteful number, since it uses less digits than its factorization.

87178851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312506 (or 312503 counting only the distinct ones).

The product of its digits is 125440, while the sum is 45.

The square root of 87178851 is about 9336.9615507402. The cubic root of 87178851 is about 443.4081931489.

The spelling of 87178851 in words is "eighty-seven million, one hundred seventy-eight thousand, eight hundred fifty-one".