87124113 has 16 divisors (see below), whose sum is σ = 130843840. Its totient is φ = 57285792.

The previous prime is 87124111. The next prime is 87124117. The reversal of 87124113 is 31142178.

It is not a de Polignac number, because 87124113 - 2¹ = 87124111 is a prime.

It is a super-2 number, since 2×87124113² = 15181222132073538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87124111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20131 + ... + 24072.

It is an arithmetic number, because the mean of its divisors is an integer number (8177740).

Almost surely, 2^87124113 is an apocalyptic number.

It is an amenable number.

87124113 is a deficient number, since it is larger than the sum of its proper divisors (43719727).

87124113 is a wasteful number, since it uses less digits than its factorization.

87124113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44285 (or 44279 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 87124113 is about 9334.0298371068. The cubic root of 87124113 is about 443.3153710978.

The spelling of 87124113 in words is "eighty-seven million, one hundred twenty-four thousand, one hundred thirteen".