16777289 has 2 divisors, whose sum is σ = 16777290. Its totient is φ = 16777288.

The previous prime is 16777259. The next prime is 16777291. The reversal of 16777289 is 98277761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 5721664 = 3325^2 + 2392^2 .

It is a cyclic number.

It is not a de Polignac number, because 16777289 - 2²⁴ = 73 is a prime.

It is a Sophie Germain prime.

Together with 16777291, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16777259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8388644 + 8388645.

It is an arithmetic number, because the mean of its divisors is an integer number (8388645).

Almost surely, 2^16777289 is an apocalyptic number.

It is an amenable number.

16777289 is a deficient number, since it is larger than the sum of its proper divisors (1).

16777289 is an equidigital number, since it uses as much as digits as its factorization.

16777289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 47.

The square root of 16777289 is about 4096.0089111231. The cubic root of 16777289 is about 256.0003712967. Note that the first 3 decimals are identical.

The spelling of 16777289 in words is "sixteen million, seven hundred seventy-seven thousand, two hundred eighty-nine".