12929866 has 4 divisors (see below), whose sum is σ = 19394802. Its totient is φ = 6464932.

The previous prime is 12929863. The next prime is 12929879. The reversal of 12929866 is 66892921.

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

It can be written as a sum of positive squares in only one way, i.e., 8242641 + 4687225 = 2871^2 + 2165^2 .

It is not an unprimeable number, because it can be changed into a prime (12929863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3232465 + ... + 3232468.

Almost surely, 2^12929866 is an apocalyptic number.

12929866 is a deficient number, since it is larger than the sum of its proper divisors (6464936).

12929866 is an equidigital number, since it uses as much as digits as its factorization.

12929866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6464935.

The product of its digits is 93312, while the sum is 43.

The square root of 12929866 is about 3595.8122865355. The cubic root of 12929866 is about 234.7098637586.

The spelling of 12929866 in words is "twelve million, nine hundred twenty-nine thousand, eight hundred sixty-six".