87544109 has 4 divisors (see below), whose sum is σ = 89910204. Its totient is φ = 85178016.

The previous prime is 87544099. The next prime is 87544123. The reversal of 87544109 is 90144578.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46199209 + 41344900 = 6797^2 + 6430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87544109 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 (87544159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1182992 + ... + 1183065.

It is an arithmetic number, because the mean of its divisors is an integer number (22477551).

Almost surely, 2^87544109 is an apocalyptic number.

It is an amenable number.

87544109 is a deficient number, since it is larger than the sum of its proper divisors (2366095).

87544109 is a wasteful number, since it uses less digits than its factorization.

87544109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366094.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 87544109 is about 9356.5008950996. The cubic root of 87544109 is about 444.0265874970.

The spelling of 87544109 in words is "eighty-seven million, five hundred forty-four thousand, one hundred nine".