16649303 has 4 divisors (see below), whose sum is σ = 18162888. Its totient is φ = 15135720.

The previous prime is 16649293. The next prime is 16649317. The reversal of 16649303 is 30394661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16649303 - 2⁸ = 16649047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16649303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16649323) 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, 756776 + ... + 756797.

It is an arithmetic number, because the mean of its divisors is an integer number (4540722).

Almost surely, 2^16649303 is an apocalyptic number.

16649303 is a deficient number, since it is larger than the sum of its proper divisors (1513585).

16649303 is a wasteful number, since it uses less digits than its factorization.

16649303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513584.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 16649303 is about 4080.3557442949. The cubic root of 16649303 is about 255.3477403644.

Adding to 16649303 its sum of digits (32), we get a triangular number (16649335 = T₅₇₇₀).

The spelling of 16649303 in words is "sixteen million, six hundred forty-nine thousand, three hundred three".