16849009 has 2 divisors, whose sum is σ = 16849010. Its totient is φ = 16849008.

The previous prime is 16849003. The next prime is 16849013. The reversal of 16849009 is 90094861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16834609 + 14400 = 4103^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 16849009 - 2¹¹ = 16846961 is a prime.

It is not a weakly prime, because it can be changed into another prime (16849003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8424504 + 8424505.

It is an arithmetic number, because the mean of its divisors is an integer number (8424505).

Almost surely, 2^16849009 is an apocalyptic number.

It is an amenable number.

16849009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16849009 is an equidigital number, since it uses as much as digits as its factorization.

16849009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 16849009 is about 4104.7544384530. The cubic root of 16849009 is about 256.3646384548.

The spelling of 16849009 in words is "sixteen million, eight hundred forty-nine thousand, nine".