16949903 has 4 divisors (see below), whose sum is σ = 16978800. Its totient is φ = 16921008.

The previous prime is 16949899. The next prime is 16949923. The reversal of 16949903 is 30994961.

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 16949903 - 2² = 16949899 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 (16949923) 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, 13550 + ... + 14747.

It is an arithmetic number, because the mean of its divisors is an integer number (4244700).

Almost surely, 2^16949903 is an apocalyptic number.

16949903 is a deficient number, since it is larger than the sum of its proper divisors (28897).

16949903 is an equidigital number, since it uses as much as digits as its factorization.

16949903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28896.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 16949903 is about 4117.0259897164. The cubic root of 16949903 is about 256.8753350773.

The spelling of 16949903 in words is "sixteen million, nine hundred forty-nine thousand, nine hundred three".