16949405 has 16 divisors (see below), whose sum is σ = 22906368. Its totient is φ = 11928000.

The previous prime is 16949381. The next prime is 16949411. The reversal of 16949405 is 50494961.

It is not a de Polignac number, because 16949405 - 2⁶ = 16949341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3266 + ... + 6675.

It is an arithmetic number, because the mean of its divisors is an integer number (1431648).

Almost surely, 2^16949405 is an apocalyptic number.

It is an amenable number.

16949405 is a deficient number, since it is larger than the sum of its proper divisors (5956963).

16949405 is a wasteful number, since it uses less digits than its factorization.

16949405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9988.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 16949405 is about 4116.9655087212. The cubic root of 16949405 is about 256.8728193270.

The spelling of 16949405 in words is "sixteen million, nine hundred forty-nine thousand, four hundred five".