87912071 has 4 divisors (see below), whose sum is σ = 94674552. Its totient is φ = 81149592.

The previous prime is 87912061. The next prime is 87912073. The reversal of 87912071 is 17021978.

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

It is a cyclic number.

It is not a de Polignac number, because 87912071 - 2⁶ = 87912007 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 (87912073) 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, 3381221 + ... + 3381246.

It is an arithmetic number, because the mean of its divisors is an integer number (23668638).

Almost surely, 2^87912071 is an apocalyptic number.

87912071 is a deficient number, since it is larger than the sum of its proper divisors (6762481).

87912071 is a wasteful number, since it uses less digits than its factorization.

87912071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762480.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 87912071 is about 9376.1437169020. The cubic root of 87912071 is about 444.6478230282.

The spelling of 87912071 in words is "eighty-seven million, nine hundred twelve thousand, seventy-one".