16972289 has 2 divisors, whose sum is σ = 16972290. Its totient is φ = 16972288.

The previous prime is 16972271. The next prime is 16972297. The reversal of 16972289 is 98227961.

It is a happy number.

16972289 is nontrivially palindromic in base 8.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9048064 + 7924225 = 3008^2 + 2815^2 .

It is a cyclic number.

It is not a de Polignac number, because 16972289 - 2¹⁶ = 16906753 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16972259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8486144 + 8486145.

It is an arithmetic number, because the mean of its divisors is an integer number (8486145).

Almost surely, 2^16972289 is an apocalyptic number.

It is an amenable number.

16972289 is a deficient number, since it is larger than the sum of its proper divisors (1).

16972289 is an equidigital number, since it uses as much as digits as its factorization.

16972289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 16972289 is about 4119.7438027140. The cubic root of 16972289 is about 256.9883717429.

The spelling of 16972289 in words is "sixteen million, nine hundred seventy-two thousand, two hundred eighty-nine".