130820289 has 4 divisors (see below), whose sum is σ = 174427056. Its totient is φ = 87213524.

The previous prime is 130820257. The next prime is 130820309. The reversal of 130820289 is 982028031.

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, and also an emirpimes, since its reverse is a distinct semiprime: 982028031 = 3 ⋅327342677.

It is a cyclic number.

It is not a de Polignac number, because 130820289 - 2⁵ = 130820257 is a prime.

It is a super-2 number, since 2×130820289² = 34227896028087042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (130820089) 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, 21803379 + ... + 21803384.

It is an arithmetic number, because the mean of its divisors is an integer number (43606764).

Almost surely, 2^130820289 is an apocalyptic number.

It is an amenable number.

130820289 is a deficient number, since it is larger than the sum of its proper divisors (43606767).

130820289 is an equidigital number, since it uses as much as digits as its factorization.

130820289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43606766.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 130820289 is about 11437.6697364454. The cubic root of 130820289 is about 507.6429603640.

The spelling of 130820289 in words is "one hundred thirty million, eight hundred twenty thousand, two hundred eighty-nine".