12943906 has 4 divisors (see below), whose sum is σ = 19415862. Its totient is φ = 6471952.

The previous prime is 12943901. The next prime is 12943927. The reversal of 12943906 is 60934921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60934921 = 191 ⋅319031.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 19881 = 3595^2 + 141^2 .

It is not an unprimeable number, because it can be changed into a prime (12943901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3235975 + ... + 3235978.

Almost surely, 2^12943906 is an apocalyptic number.

12943906 is a deficient number, since it is larger than the sum of its proper divisors (6471956).

12943906 is an equidigital number, since it uses as much as digits as its factorization.

12943906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6471955.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 12943906 is about 3597.7640278373. The cubic root of 12943906 is about 234.7947868984.

The spelling of 12943906 in words is "twelve million, nine hundred forty-three thousand, nine hundred six".