1230013809 has 8 divisors (see below), whose sum is σ = 1822242720. Its totient is φ = 820009188.

The previous prime is 1230013793. The next prime is 1230013823. The reversal of 1230013809 is 9083100321.

It is not a de Polignac number, because 1230013809 - 2⁴ = 1230013793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 45556067 = 1230013809 / (1 + 2 + 3 + 0 + 0 + 1 + 3 + 8 + 0 + 9).

It is not an unprimeable number, because it can be changed into a prime (1230012809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22778007 + ... + 22778060.

It is an arithmetic number, because the mean of its divisors is an integer number (227780340).

Almost surely, 2^1230013809 is an apocalyptic number.

It is an amenable number.

1230013809 is a deficient number, since it is larger than the sum of its proper divisors (592228911).

1230013809 is an equidigital number, since it uses as much as digits as its factorization.

1230013809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45556076 (or 45556070 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1230013809 is about 35071.5527030099. The cubic root of 1230013809 is about 1071.4452793052.

The spelling of 1230013809 in words is "one billion, two hundred thirty million, thirteen thousand, eight hundred nine".