87117125 has 8 divisors (see below), whose sum is σ = 108722328. Its totient is φ = 69693600.

The previous prime is 87117113. The next prime is 87117133. The reversal of 87117125 is 52171178.

It can be written as a sum of positive squares in 4 ways, for example, as 13535041 + 73582084 = 3679^2 + 8578^2 .

It is not a de Polignac number, because 87117125 - 2¹⁰ = 87116101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87117091 and 87117100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348344 + ... + 348593.

It is an arithmetic number, because the mean of its divisors is an integer number (13590291).

Almost surely, 2^87117125 is an apocalyptic number.

It is an amenable number.

87117125 is a deficient number, since it is larger than the sum of its proper divisors (21605203).

87117125 is an equidigital number, since it uses as much as digits as its factorization.

87117125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696952 (or 696942 counting only the distinct ones).

The product of its digits is 3920, while the sum is 32.

The square root of 87117125 is about 9333.6555003921. The cubic root of 87117125 is about 443.3035183874.

The spelling of 87117125 in words is "eighty-seven million, one hundred seventeen thousand, one hundred twenty-five".