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BaseRepresentation
bin1010011000100…
…10111011111111
320001220121121011
411030102323333
5134300000000
612351020051
72105263123
oct514227377
9201817534
1087109375
1145197621
122520a627
131507c312
14b7d7583
1579aa2ba
hex5312eff

87109375 has 18 divisors (see below), whose sum is σ = 109374944. Its totient is φ = 69375000.

The previous prime is 87109339. The next prime is 87109391. The reversal of 87109375 is 57390178.

It is a trimorphic number since its cube, 660989701747894287109375, ends in 87109375.

It is a de Polignac number, because none of the positive numbers 2k-87109375 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 390514 + ... + 390736.

Almost surely, 287109375 is an apocalyptic number.

87109375 is a deficient number, since it is larger than the sum of its proper divisors (22265569).

87109375 is an frugal number, since it uses more digits than its factorization.

87109375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 87109375 is about 9333.2403269175. The cubic root of 87109375 is about 443.2903724678.

The spelling of 87109375 in words is "eighty-seven million, one hundred nine thousand, three hundred seventy-five".