1300123109 has 4 divisors (see below), whose sum is σ = 1300338060. Its totient is φ = 1299908160.

The previous prime is 1300123091. The next prime is 1300123147. The reversal of 1300123109 is 9013210031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 322310209 + 977812900 = 17953^2 + 31270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1300123109 - 2¹⁶ = 1300057573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1300123159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98132 + ... + 110589.

It is an arithmetic number, because the mean of its divisors is an integer number (325084515).

Almost surely, 2^1300123109 is an apocalyptic number.

It is an amenable number.

1300123109 is a deficient number, since it is larger than the sum of its proper divisors (214951).

1300123109 is an equidigital number, since it uses as much as digits as its factorization.

1300123109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214950.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1300123109 is about 36057.2199288853. The cubic root of 1300123109 is about 1091.4273333292.

The spelling of 1300123109 in words is "one billion, three hundred million, one hundred twenty-three thousand, one hundred nine".