16911949 has 2 divisors, whose sum is σ = 16911950. Its totient is φ = 16911948.

The previous prime is 16911931. The next prime is 16911953. The reversal of 16911949 is 94911961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13089924 + 3822025 = 3618^2 + 1955^2 .

It is a cyclic number.

It is not a de Polignac number, because 16911949 - 2¹¹ = 16909901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16911449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8455974 + 8455975.

It is an arithmetic number, because the mean of its divisors is an integer number (8455975).

Almost surely, 2^16911949 is an apocalyptic number.

It is an amenable number.

16911949 is a deficient number, since it is larger than the sum of its proper divisors (1).

16911949 is an equidigital number, since it uses as much as digits as its factorization.

16911949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 40.

The square root of 16911949 is about 4112.4140112591. The cubic root of 16911949 is about 256.6834611675.

The spelling of 16911949 in words is "sixteen million, nine hundred eleven thousand, nine hundred forty-nine".