16649359 has 2 divisors, whose sum is σ = 16649360. Its totient is φ = 16649358.

The previous prime is 16649357. The next prime is 16649383. The reversal of 16649359 is 95394661.

It is a weak prime.

It is an emirp because it is prime and its reverse (95394661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16649359 - 2¹ = 16649357 is a prime.

It is a super-2 number, since 2×16649359² = 554402310221762, which contains 22 as substring.

Together with 16649357, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16649351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8324679 + 8324680.

It is an arithmetic number, because the mean of its divisors is an integer number (8324680).

Almost surely, 2^16649359 is an apocalyptic number.

16649359 is a deficient number, since it is larger than the sum of its proper divisors (1).

16649359 is an equidigital number, since it uses as much as digits as its factorization.

16649359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 43.

The square root of 16649359 is about 4080.3626064359. The cubic root of 16649359 is about 255.3480266518.

The spelling of 16649359 in words is "sixteen million, six hundred forty-nine thousand, three hundred fifty-nine".