87173855 has 12 divisors (see below), whose sum is σ = 108345432. Its totient is φ = 67331040.

The previous prime is 87173783. The next prime is 87173869. The reversal of 87173855 is 55837178.

It is not a de Polignac number, because 87173855 - 2¹² = 87169759 is a prime.

It is a super-2 number, since 2×87173855² = 15198561991122050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6161 + ... + 14570.

It is an arithmetic number, because the mean of its divisors is an integer number (9028786).

Almost surely, 2^87173855 is an apocalyptic number.

87173855 is a deficient number, since it is larger than the sum of its proper divisors (21171577).

87173855 is a wasteful number, since it uses less digits than its factorization.

87173855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20794 (or 20765 counting only the distinct ones).

The product of its digits is 235200, while the sum is 44.

The square root of 87173855 is about 9336.6940080523. The cubic root of 87173855 is about 443.3997227855.

The spelling of 87173855 in words is "eighty-seven million, one hundred seventy-three thousand, eight hundred fifty-five".