16624001 has 2 divisors, whose sum is σ = 16624002. Its totient is φ = 16624000.

The previous prime is 16623961. The next prime is 16624007. The reversal of 16624001 is 10042661.

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., 15523600 + 1100401 = 3940^2 + 1049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16624001 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (16624007) 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, 8312000 + 8312001.

It is an arithmetic number, because the mean of its divisors is an integer number (8312001).

Almost surely, 2^16624001 is an apocalyptic number.

It is an amenable number.

16624001 is a deficient number, since it is larger than the sum of its proper divisors (1).

16624001 is an equidigital number, since it uses as much as digits as its factorization.

16624001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 16624001 is about 4077.2541004946. The cubic root of 16624001 is about 255.2183238531.

Adding to 16624001 its reverse (10042661), we get a palindrome (26666662).

The spelling of 16624001 in words is "sixteen million, six hundred twenty-four thousand, one".