87715841 has 4 divisors (see below), whose sum is σ = 87918852. Its totient is φ = 87512832.

The previous prime is 87715787. The next prime is 87715883. The reversal of 87715841 is 14851778.

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 29116816 + 58599025 = 5396^2 + 7655^2 .

It is a cyclic number.

It is not a de Polignac number, because 87715841 - 2⁶ = 87715777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87715891) 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, 100856 + ... + 101721.

It is an arithmetic number, because the mean of its divisors is an integer number (21979713).

Almost surely, 2^87715841 is an apocalyptic number.

It is an amenable number.

87715841 is a deficient number, since it is larger than the sum of its proper divisors (203011).

87715841 is a wasteful number, since it uses less digits than its factorization.

87715841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203010.

The product of its digits is 62720, while the sum is 41.

The square root of 87715841 is about 9365.6735475886. The cubic root of 87715841 is about 444.3167412941.

The spelling of 87715841 in words is "eighty-seven million, seven hundred fifteen thousand, eight hundred forty-one".