87000071 has 4 divisors (see below), whose sum is σ = 87207144. Its totient is φ = 86793000.

The previous prime is 87000047. The next prime is 87000079. The reversal of 87000071 is 17000078.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87000071 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 (87000079) 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, 102905 + ... + 103746.

It is an arithmetic number, because the mean of its divisors is an integer number (21801786).

Almost surely, 2^87000071 is an apocalyptic number.

87000071 is a deficient number, since it is larger than the sum of its proper divisors (207073).

87000071 is a wasteful number, since it uses less digits than its factorization.

87000071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207072.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 87000071 is about 9327.3828590875. The cubic root of 87000071 is about 443.1048827074.

The spelling of 87000071 in words is "eighty-seven million, seventy-one", and thus it is an aban number and an uban number.