87173879 has 8 divisors (see below), whose sum is σ = 94358880. Its totient is φ = 80057376.

The previous prime is 87173873. The next prime is 87173903. The reversal of 87173879 is 97837178.

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 87173879 - 2¹² = 87169783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87173873) 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, 14459 + ... + 19580.

It is an arithmetic number, because the mean of its divisors is an integer number (11794860).

Almost surely, 2^87173879 is an apocalyptic number.

87173879 is a deficient number, since it is larger than the sum of its proper divisors (7185001).

87173879 is a wasteful number, since it uses less digits than its factorization.

87173879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34249.

The product of its digits is 592704, while the sum is 50.

The square root of 87173879 is about 9336.6952933037. The cubic root of 87173879 is about 443.3997634765.

The spelling of 87173879 in words is "eighty-seven million, one hundred seventy-three thousand, eight hundred seventy-nine".