87278179 has 4 divisors (see below), whose sum is σ = 87915384. Its totient is φ = 86640976.

The previous prime is 87278167. The next prime is 87278189. The reversal of 87278179 is 97187278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87278179 - 2⁹ = 87277667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87278159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318397 + ... + 318670.

It is an arithmetic number, because the mean of its divisors is an integer number (21978846).

Almost surely, 2^87278179 is an apocalyptic number.

87278179 is a deficient number, since it is larger than the sum of its proper divisors (637205).

87278179 is a wasteful number, since it uses less digits than its factorization.

87278179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637204.

The product of its digits is 395136, while the sum is 49.

The square root of 87278179 is about 9342.2791116515. The cubic root of 87278179 is about 443.5765295906.

Subtracting 87278179 from its reverse (97187278), we obtain a palindrome (9909099).

The spelling of 87278179 in words is "eighty-seven million, two hundred seventy-eight thousand, one hundred seventy-nine".