1308394856789 has 4 divisors (see below), whose sum is σ = 1318697178624. Its totient is φ = 1298092534956.

The previous prime is 1308394856771. The next prime is 1308394856801. The reversal of 1308394856789 is 9876584938031.

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.

It is a cyclic number.

It is not a de Polignac number, because 1308394856789 - 2²⁴ = 1308378079573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308394856189) 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, 5151160727 + ... + 5151160980.

It is an arithmetic number, because the mean of its divisors is an integer number (329674294656).

Almost surely, 2^{1308394856789} is an apocalyptic number.

It is an amenable number.

1308394856789 is a deficient number, since it is larger than the sum of its proper divisors (10302321835).

1308394856789 is a wasteful number, since it uses less digits than its factorization.

1308394856789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10302321834.

The product of its (nonzero) digits is 313528320, while the sum is 71.

The spelling of 1308394856789 in words is "one trillion, three hundred eight billion, three hundred ninety-four million, eight hundred fifty-six thousand, seven hundred eighty-nine".