16649351 has 2 divisors, whose sum is σ = 16649352. Its totient is φ = 16649350.

The previous prime is 16649333. The next prime is 16649357. The reversal of 16649351 is 15394661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16649351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16649357) 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, 8324675 + 8324676.

It is an arithmetic number, because the mean of its divisors is an integer number (8324676).

Almost surely, 2^16649351 is an apocalyptic number.

16649351 is a deficient number, since it is larger than the sum of its proper divisors (1).

16649351 is an equidigital number, since it uses as much as digits as its factorization.

16649351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 35.

The square root of 16649351 is about 4080.3616261307. The cubic root of 16649351 is about 255.3479857536.

Multiplying 16649351 by its sum of digits (35), we get a palindrome (582727285).

The spelling of 16649351 in words is "sixteen million, six hundred forty-nine thousand, three hundred fifty-one".