13191946 has 4 divisors (see below), whose sum is σ = 19787922. Its totient is φ = 6595972.

The previous prime is 13191929. The next prime is 13191953. The reversal of 13191946 is 64919131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64919131 = 293 ⋅221567.

It can be written as a sum of positive squares in only one way, i.e., 12680721 + 511225 = 3561^2 + 715^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3297985 + ... + 3297988.

Almost surely, 2^13191946 is an apocalyptic number.

13191946 is a deficient number, since it is larger than the sum of its proper divisors (6595976).

13191946 is an equidigital number, since it uses as much as digits as its factorization.

13191946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6595975.

The product of its digits is 5832, while the sum is 34.

The square root of 13191946 is about 3632.0718605226. The cubic root of 13191946 is about 236.2850739711.

The spelling of 13191946 in words is "thirteen million, one hundred ninety-one thousand, nine hundred forty-six".