12963135919 has 4 divisors (see below), whose sum is σ = 13725673344. Its totient is φ = 12200598496.

The previous prime is 12963135881. The next prime is 12963135931. The reversal of 12963135919 is 91953136921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91953136921 = 991 ⋅92788231.

It is a cyclic number.

It is not a de Polignac number, because 12963135919 - 2⁷ = 12963135791 is a prime.

It is a super-2 number, since 2×12963135919² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12963135979) 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, 381268687 + ... + 381268720.

It is an arithmetic number, because the mean of its divisors is an integer number (3431418336).

Almost surely, 2^12963135919 is an apocalyptic number.

12963135919 is a deficient number, since it is larger than the sum of its proper divisors (762537425).

12963135919 is an equidigital number, since it uses as much as digits as its factorization.

12963135919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762537424.

The product of its digits is 393660, while the sum is 49.

The spelling of 12963135919 in words is "twelve billion, nine hundred sixty-three million, one hundred thirty-five thousand, nine hundred nineteen".