12891306929 has 4 divisors (see below), whose sum is σ = 12897822960. Its totient is φ = 12884790900.

The previous prime is 12891306889. The next prime is 12891306931. The reversal of 12891306929 is 92960319821.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92960319821 = 71849 ⋅1293829.

It is a cyclic number.

It is not a de Polignac number, because 12891306929 - 2²⁸ = 12622871473 is a prime.

It is a super-2 number, since 2×12891306929² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12891306949) 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, 3255047 + ... + 3259004.

It is an arithmetic number, because the mean of its divisors is an integer number (3224455740).

Almost surely, 2^12891306929 is an apocalyptic number.

It is an amenable number.

12891306929 is a deficient number, since it is larger than the sum of its proper divisors (6516031).

12891306929 is an equidigital number, since it uses as much as digits as its factorization.

12891306929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6516030.

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 12891306929 in words is "twelve billion, eight hundred ninety-one million, three hundred six thousand, nine hundred twenty-nine".