12910691 has 4 divisors (see below), whose sum is σ = 12921000. Its totient is φ = 12900384.

The previous prime is 12910679. The next prime is 12910697. The reversal of 12910691 is 19601921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19601921 = 157 ⋅124853.

It is a cyclic number.

It is not a de Polignac number, because 12910691 - 2¹⁰ = 12909667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12910697) 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, 2966 + ... + 5883.

It is an arithmetic number, because the mean of its divisors is an integer number (3230250).

Almost surely, 2^12910691 is an apocalyptic number.

12910691 is a deficient number, since it is larger than the sum of its proper divisors (10309).

12910691 is an equidigital number, since it uses as much as digits as its factorization.

12910691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10308.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 12910691 is about 3593.1450012489. The cubic root of 12910691 is about 234.5937813941.

The spelling of 12910691 in words is "twelve million, nine hundred ten thousand, six hundred ninety-one".