87043109 has 16 divisors (see below), whose sum is σ = 92783232. Its totient is φ = 81489408.

The previous prime is 87043091. The next prime is 87043147. The reversal of 87043109 is 90134078.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87043109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87043169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277937 + ... + 278249.

It is an arithmetic number, because the mean of its divisors is an integer number (5798952).

Almost surely, 2^87043109 is an apocalyptic number.

It is an amenable number.

87043109 is a deficient number, since it is larger than the sum of its proper divisors (5740123).

87043109 is a wasteful number, since it uses less digits than its factorization.

87043109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 87043109 is about 9329.6896518587. The cubic root of 87043109 is about 443.1779370699.

The spelling of 87043109 in words is "eighty-seven million, forty-three thousand, one hundred nine".