87130129 has 4 divisors (see below), whose sum is σ = 87543280. Its totient is φ = 86716980.

The previous prime is 87130103. The next prime is 87130139. The reversal of 87130129 is 92103178.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87130129 - 2⁵ = 87130097 is a prime.

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 87130129.

It is not an unprimeable number, because it can be changed into a prime (87130139) 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, 206259 + ... + 206680.

It is an arithmetic number, because the mean of its divisors is an integer number (21885820).

Almost surely, 2^87130129 is an apocalyptic number.

It is an amenable number.

87130129 is a deficient number, since it is larger than the sum of its proper divisors (413151).

87130129 is a wasteful number, since it uses less digits than its factorization.

87130129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413150.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 87130129 is about 9334.3520932093. The cubic root of 87130129 is about 443.3255746408.

The spelling of 87130129 in words is "eighty-seven million, one hundred thirty thousand, one hundred twenty-nine".