12929691 has 4 divisors (see below), whose sum is σ = 17239592. Its totient is φ = 8619792.

The previous prime is 12929629. The next prime is 12929699. The reversal of 12929691 is 19692921.

12929691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12929691 - 2¹⁹ = 12405403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12929699) 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, 2154946 + ... + 2154951.

It is an arithmetic number, because the mean of its divisors is an integer number (4309898).

Almost surely, 2^12929691 is an apocalyptic number.

12929691 is a deficient number, since it is larger than the sum of its proper divisors (4309901).

12929691 is an equidigital number, since it uses as much as digits as its factorization.

12929691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309900.

The product of its digits is 17496, while the sum is 39.

The square root of 12929691 is about 3595.7879525912. The cubic root of 12929691 is about 234.7088048558.

The spelling of 12929691 in words is "twelve million, nine hundred twenty-nine thousand, six hundred ninety-one".