130528661 has 4 divisors (see below), whose sum is σ = 130552800. Its totient is φ = 130504524.

The previous prime is 130528649. The next prime is 130528667. The reversal of 130528661 is 166825031.

It is a happy number.

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 130528661 - 2⁶ = 130528597 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 (130528667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200 + ... + 16158.

It is an arithmetic number, because the mean of its divisors is an integer number (32638200).

Almost surely, 2^130528661 is an apocalyptic number.

It is an amenable number.

130528661 is a deficient number, since it is larger than the sum of its proper divisors (24139).

130528661 is an equidigital number, since it uses as much as digits as its factorization.

130528661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24138.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 130528661 is about 11424.9140478167. The cubic root of 130528661 is about 507.2654627402.

The spelling of 130528661 in words is "one hundred thirty million, five hundred twenty-eight thousand, six hundred sixty-one".