87130541 has 4 divisors (see below), whose sum is σ = 88028892. Its totient is φ = 86232192.

The previous prime is 87130531. The next prime is 87130543. The reversal of 87130541 is 14503178.

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 70073641 + 17056900 = 8371^2 + 4130^2 .

It is a cyclic number.

It is not a de Polignac number, because 87130541 - 2¹⁰ = 87129517 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 (87130543) 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, 449030 + ... + 449223.

It is an arithmetic number, because the mean of its divisors is an integer number (22007223).

Almost surely, 2^87130541 is an apocalyptic number.

It is an amenable number.

87130541 is a deficient number, since it is larger than the sum of its proper divisors (898351).

87130541 is an equidigital number, since it uses as much as digits as its factorization.

87130541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898350.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 87130541 is about 9334.3741622028. The cubic root of 87130541 is about 443.3262734034.

The spelling of 87130541 in words is "eighty-seven million, one hundred thirty thousand, five hundred forty-one".