130123009 has 2 divisors, whose sum is σ = 130123010. Its totient is φ = 130123008.

The previous prime is 130122989. The next prime is 130123061. The reversal of 130123009 is 900321031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80730225 + 49392784 = 8985^2 + 7028^2 .

It is a cyclic number.

It is not a de Polignac number, because 130123009 - 2⁵ = 130122977 is a prime.

It is not a weakly prime, because it can be changed into another prime (130123069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65061504 + 65061505.

It is an arithmetic number, because the mean of its divisors is an integer number (65061505).

Almost surely, 2^130123009 is an apocalyptic number.

It is an amenable number.

130123009 is a deficient number, since it is larger than the sum of its proper divisors (1).

130123009 is an equidigital number, since it uses as much as digits as its factorization.

130123009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 130123009 is about 11407.1472770364. The cubic root of 130123009 is about 506.7394306757.

It can be divided in two parts, 1301 and 23009, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 130123009 in words is "one hundred thirty million, one hundred twenty-three thousand, nine".