16649311 has 4 divisors (see below), whose sum is σ = 19027792. Its totient is φ = 14270832.

The previous prime is 16649293. The next prime is 16649317. The reversal of 16649311 is 11394661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11394661 = 19 ⋅599719.

It is a cyclic number.

It is not a de Polignac number, because 16649311 - 2¹⁵ = 16616543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16649317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1189230 + ... + 1189243.

It is an arithmetic number, because the mean of its divisors is an integer number (4756948).

Almost surely, 2^16649311 is an apocalyptic number.

16649311 is a deficient number, since it is larger than the sum of its proper divisors (2378481).

16649311 is an equidigital number, since it uses as much as digits as its factorization.

16649311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378480.

The product of its digits is 3888, while the sum is 31.

The square root of 16649311 is about 4080.3567246014. The cubic root of 16649311 is about 255.3477812626.

The spelling of 16649311 in words is "sixteen million, six hundred forty-nine thousand, three hundred eleven".