87545071 has 4 divisors (see below), whose sum is σ = 89911192. Its totient is φ = 85178952.

The previous prime is 87545057. The next prime is 87545077. The reversal of 87545071 is 17054578.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17054578 = 2 ⋅8527289.

It is a cyclic number.

It is not a de Polignac number, because 87545071 - 2⁵ = 87545039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 2366083 = 87545071 / (8 + 7 + 5 + 4 + 5 + 0 + 7 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87545071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87545077) 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, 1183005 + ... + 1183078.

It is an arithmetic number, because the mean of its divisors is an integer number (22477798).

Almost surely, 2^87545071 is an apocalyptic number.

87545071 is a deficient number, since it is larger than the sum of its proper divisors (2366121).

87545071 is a wasteful number, since it uses less digits than its factorization.

87545071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366120.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 87545071 is about 9356.5523030655. The cubic root of 87545071 is about 444.0282139228.

The spelling of 87545071 in words is "eighty-seven million, five hundred forty-five thousand, seventy-one".