130359821 has 4 divisors (see below), whose sum is σ = 130844700. Its totient is φ = 129874944.

The previous prime is 130359797. The next prime is 130359839. The reversal of 130359821 is 128953031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 128953031 = 137 ⋅941263.

It can be written as a sum of positive squares in 2 ways, for example, as 18232900 + 112126921 = 4270^2 + 10589^2 .

It is a cyclic number.

It is not a de Polignac number, because 130359821 - 2¹⁰ = 130358797 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 (130359841) 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, 242036 + ... + 242573.

It is an arithmetic number, because the mean of its divisors is an integer number (32711175).

Almost surely, 2^130359821 is an apocalyptic number.

It is an amenable number.

130359821 is a deficient number, since it is larger than the sum of its proper divisors (484879).

130359821 is an equidigital number, since it uses as much as digits as its factorization.

130359821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484878.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 130359821 is about 11417.5225421280. The cubic root of 130359821 is about 507.0466508846.

The spelling of 130359821 in words is "one hundred thirty million, three hundred fifty-nine thousand, eight hundred twenty-one".