16409213 has 2 divisors, whose sum is σ = 16409214. Its totient is φ = 16409212.

The previous prime is 16409153. The next prime is 16409227. The reversal of 16409213 is 31290461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14341369 + 2067844 = 3787^2 + 1438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16409213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16409713) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8204606 + 8204607.

It is an arithmetic number, because the mean of its divisors is an integer number (8204607).

Almost surely, 2^16409213 is an apocalyptic number.

It is an amenable number.

16409213 is a deficient number, since it is larger than the sum of its proper divisors (1).

16409213 is an equidigital number, since it uses as much as digits as its factorization.

16409213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 16409213 is about 4050.8286806529. The cubic root of 16409213 is about 254.1143852094.

Adding to 16409213 its reverse (31290461), we get a palindrome (47699674).

The spelling of 16409213 in words is "sixteen million, four hundred nine thousand, two hundred thirteen".