87471457 has 4 divisors (see below), whose sum is σ = 87595540. Its totient is φ = 87347376.

The previous prime is 87471403. The next prime is 87471463. The reversal of 87471457 is 75417478.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25361296 + 62110161 = 5036^2 + 7881^2 .

It is a cyclic number.

It is not a de Polignac number, because 87471457 - 2¹¹ = 87469409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87471467) 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, 60978 + ... + 62395.

It is an arithmetic number, because the mean of its divisors is an integer number (21898885).

Almost surely, 2^87471457 is an apocalyptic number.

It is an amenable number.

87471457 is a deficient number, since it is larger than the sum of its proper divisors (124083).

87471457 is a wasteful number, since it uses less digits than its factorization.

87471457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124082.

The product of its digits is 219520, while the sum is 43.

The square root of 87471457 is about 9352.6176549670. The cubic root of 87471457 is about 443.9037223948.

The spelling of 87471457 in words is "eighty-seven million, four hundred seventy-one thousand, four hundred fifty-seven".