87912147 has 4 divisors (see below), whose sum is σ = 117216200. Its totient is φ = 58608096.

The previous prime is 87912133. The next prime is 87912157. The reversal of 87912147 is 74121978.

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

It is not a de Polignac number, because 87912147 - 2⁴ = 87912131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87912127) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14652022 + ... + 14652027.

It is an arithmetic number, because the mean of its divisors is an integer number (29304050).

Almost surely, 2^87912147 is an apocalyptic number.

87912147 is a deficient number, since it is larger than the sum of its proper divisors (29304053).

87912147 is a wasteful number, since it uses less digits than its factorization.

87912147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29304052.

The product of its digits is 28224, while the sum is 39.

The square root of 87912147 is about 9376.1477697400. The cubic root of 87912147 is about 444.6479511609.

The spelling of 87912147 in words is "eighty-seven million, nine hundred twelve thousand, one hundred forty-seven".