13201906 has 4 divisors (see below), whose sum is σ = 19802862. Its totient is φ = 6600952.

The previous prime is 13201891. The next prime is 13201907. The reversal of 13201906 is 60910231.

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., 11498881 + 1703025 = 3391^2 + 1305^2 .

It is not an unprimeable number, because it can be changed into a prime (13201907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3300475 + ... + 3300478.

Almost surely, 2^13201906 is an apocalyptic number.

13201906 is a deficient number, since it is larger than the sum of its proper divisors (6600956).

13201906 is an equidigital number, since it uses as much as digits as its factorization.

13201906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600955.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 13201906 is about 3633.4427200659. The cubic root of 13201906 is about 236.3445245709.

The spelling of 13201906 in words is "thirteen million, two hundred one thousand, nine hundred six".