16404229 has 2 divisors, whose sum is σ = 16404230. Its totient is φ = 16404228.

The previous prime is 16404197. The next prime is 16404247. The reversal of 16404229 is 92240461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10144225 + 6260004 = 3185^2 + 2502^2 .

It is a cyclic number.

It is not a de Polignac number, because 16404229 - 2⁵ = 16404197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16404197 and 16404206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16404299) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8202114 + 8202115.

It is an arithmetic number, because the mean of its divisors is an integer number (8202115).

Almost surely, 2^16404229 is an apocalyptic number.

It is an amenable number.

16404229 is a deficient number, since it is larger than the sum of its proper divisors (1).

16404229 is an equidigital number, since it uses as much as digits as its factorization.

16404229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16404229 is about 4050.2134511653. The cubic root of 16404229 is about 254.0886550633.

The spelling of 16404229 in words is "sixteen million, four hundred four thousand, two hundred twenty-nine".