16554949 has 2 divisors, whose sum is σ = 16554950. Its totient is φ = 16554948.

The previous prime is 16554919. The next prime is 16554953. The reversal of 16554949 is 94945561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14250625 + 2304324 = 3775^2 + 1518^2 .

It is a cyclic number.

It is not a de Polignac number, because 16554949 - 2⁹ = 16554437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16554919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277474 + 8277475.

It is an arithmetic number, because the mean of its divisors is an integer number (8277475).

Almost surely, 2^16554949 is an apocalyptic number.

It is an amenable number.

16554949 is a deficient number, since it is larger than the sum of its proper divisors (1).

16554949 is an equidigital number, since it uses as much as digits as its factorization.

16554949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The square root of 16554949 is about 4068.7773347776. Note that the first 3 decimals coincide. The cubic root of 16554949 is about 254.8644621251.

The spelling of 16554949 in words is "sixteen million, five hundred fifty-four thousand, nine hundred forty-nine".