16629449 has 2 divisors, whose sum is σ = 16629450. Its totient is φ = 16629448.

The previous prime is 16629413. The next prime is 16629461. The reversal of 16629449 is 94492661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13542400 + 3087049 = 3680^2 + 1757^2 .

It is an emirp because it is prime and its reverse (94492661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16629449 - 2¹² = 16625353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16629409) 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, 8314724 + 8314725.

It is an arithmetic number, because the mean of its divisors is an integer number (8314725).

Almost surely, 2^16629449 is an apocalyptic number.

It is an amenable number.

16629449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16629449 is an equidigital number, since it uses as much as digits as its factorization.

16629449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 16629449 is about 4077.9221424642. The cubic root of 16629449 is about 255.2462007676.

Adding to 16629449 its product of digits (93312), we get a palindrome (16722761).

It can be divided in two parts, 1662 and 9449, that added together give a palindrome (11111).

The spelling of 16629449 in words is "sixteen million, six hundred twenty-nine thousand, four hundred forty-nine".