12275979389 has 4 divisors (see below), whose sum is σ = 12276321756. Its totient is φ = 12275637024.

The previous prime is 12275979347. The next prime is 12275979403. The reversal of 12275979389 is 98397957221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98397957221 = 77543 ⋅1268947.

It can be written as a sum of positive squares in 2 ways, for example, as 9315531289 + 2960448100 = 96517^2 + 54410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12275979389 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 (12275978389) 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, 110144 + ... + 191529.

It is an arithmetic number, because the mean of its divisors is an integer number (3069080439).

Almost surely, 2^12275979389 is an apocalyptic number.

It is an amenable number.

12275979389 is a deficient number, since it is larger than the sum of its proper divisors (342367).

12275979389 is an equidigital number, since it uses as much as digits as its factorization.

12275979389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342366.

The product of its digits is 17146080, while the sum is 62.

The spelling of 12275979389 in words is "twelve billion, two hundred seventy-five million, nine hundred seventy-nine thousand, three hundred eighty-nine".