16503949 has 16 divisors (see below), whose sum is σ = 21473280. Its totient is φ = 12299760.

The previous prime is 16503947. The next prime is 16503953. The reversal of 16503949 is 94930561.

It is not a de Polignac number, because 16503949 - 2¹ = 16503947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16503941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2889 + ... + 6430.

It is an arithmetic number, because the mean of its divisors is an integer number (1342080).

Almost surely, 2^16503949 is an apocalyptic number.

It is an amenable number.

16503949 is a deficient number, since it is larger than the sum of its proper divisors (4969331).

16503949 is a wasteful number, since it uses less digits than its factorization.

16503949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9360.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 16503949 is about 4062.5052615351. The cubic root of 16503949 is about 254.6024768626.

The spelling of 16503949 in words is "sixteen million, five hundred three thousand, nine hundred forty-nine".