16905049 has 6 divisors (see below), whose sum is σ = 19665114. Its totient is φ = 14490000.

The previous prime is 16905043. The next prime is 16905059. The reversal of 16905049 is 94050961.

It can be written as a sum of positive squares in only one way, i.e., 16257024 + 648025 = 4032^2 + 805^2 .

It is not a de Polignac number, because 16905049 - 2⁵ = 16905017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16905043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172452 + ... + 172549.

It is an arithmetic number, because the mean of its divisors is an integer number (3277519).

Almost surely, 2^16905049 is an apocalyptic number.

It is an amenable number.

16905049 is a deficient number, since it is larger than the sum of its proper divisors (2760065).

16905049 is an equidigital number, since it uses as much as digits as its factorization.

16905049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345015 (or 345008 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 16905049 is about 4111.5750023562. The cubic root of 16905049 is about 256.6485478486.

The spelling of 16905049 in words is "sixteen million, nine hundred five thousand, forty-nine".