1309809089807 has 4 divisors (see below), whose sum is σ = 1354974920520. Its totient is φ = 1264643259096.

The previous prime is 1309809089773. The next prime is 1309809089819. The reversal of 1309809089807 is 7089809089031.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1309809089807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1309809089807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309809085807) 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, 22582915313 + ... + 22582915370.

It is an arithmetic number, because the mean of its divisors is an integer number (338743730130).

Almost surely, 2^{1309809089807} is an apocalyptic number.

1309809089807 is a deficient number, since it is larger than the sum of its proper divisors (45165830713).

1309809089807 is an equidigital number, since it uses as much as digits as its factorization.

1309809089807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45165830712.

The product of its (nonzero) digits is 7838208, while the sum is 62.

The spelling of 1309809089807 in words is "one trillion, three hundred nine billion, eight hundred nine million, eighty-nine thousand, eight hundred seven".