16404413 has 2 divisors, whose sum is σ = 16404414. Its totient is φ = 16404412.

The previous prime is 16404397. The next prime is 16404449. The reversal of 16404413 is 31440461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16345849 + 58564 = 4043^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 16404413 - 2⁴ = 16404397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16400413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8202206 + 8202207.

It is an arithmetic number, because the mean of its divisors is an integer number (8202207).

Almost surely, 2^16404413 is an apocalyptic number.

It is an amenable number.

16404413 is a deficient number, since it is larger than the sum of its proper divisors (1).

16404413 is an equidigital number, since it uses as much as digits as its factorization.

16404413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 16404413 is about 4050.2361659538. The cubic root of 16404413 is about 254.0896050651.

Adding to 16404413 its reverse (31440461), we get a palindrome (47844874).

The spelling of 16404413 in words is "sixteen million, four hundred four thousand, four hundred thirteen".