87605071 has 4 divisors (see below), whose sum is σ = 88273944. Its totient is φ = 86936200.

The previous prime is 87605059. The next prime is 87605081. The reversal of 87605071 is 17050678.

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 87605071 - 2¹³ = 87596879 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 (87605051) 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, 334240 + ... + 334501.

It is an arithmetic number, because the mean of its divisors is an integer number (22068486).

Almost surely, 2^87605071 is an apocalyptic number.

87605071 is a deficient number, since it is larger than the sum of its proper divisors (668873).

87605071 is a wasteful number, since it uses less digits than its factorization.

87605071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668872.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 87605071 is about 9359.7580631125. The cubic root of 87605071 is about 444.1296306691.

It can be divided in two parts, 8760 and 5071, that added together give a palindrome (13831).

The spelling of 87605071 in words is "eighty-seven million, six hundred five thousand, seventy-one".