16404937 has 2 divisors, whose sum is σ = 16404938. Its totient is φ = 16404936.

The previous prime is 16404863. The next prime is 16404953. The reversal of 16404937 is 73940461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15968016 + 436921 = 3996^2 + 661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16404937 is a prime.

It is not a weakly prime, because it can be changed into another prime (16404137) 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, 8202468 + 8202469.

It is an arithmetic number, because the mean of its divisors is an integer number (8202469).

Almost surely, 2^16404937 is an apocalyptic number.

It is an amenable number.

16404937 is a deficient number, since it is larger than the sum of its proper divisors (1).

16404937 is an equidigital number, since it uses as much as digits as its factorization.

16404937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 16404937 is about 4050.3008530231. The cubic root of 16404937 is about 254.0923104658.

The spelling of 16404937 in words is "sixteen million, four hundred four thousand, nine hundred thirty-seven".