289976849 has 2 divisors, whose sum is σ = 289976850. Its totient is φ = 289976848.

The previous prime is 289976783. The next prime is 289976857. The reversal of 289976849 is 948679982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173185600 + 116791249 = 13160^2 + 10807^2 .

It is a cyclic number.

It is not a de Polignac number, because 289976849 - 2¹⁶ = 289911313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 289976791 and 289976800.

It is not a weakly prime, because it can be changed into another prime (289976899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144988424 + 144988425.

It is an arithmetic number, because the mean of its divisors is an integer number (144988425).

Almost surely, 2^289976849 is an apocalyptic number.

It is an amenable number.

289976849 is a deficient number, since it is larger than the sum of its proper divisors (1).

289976849 is an equidigital number, since it uses as much as digits as its factorization.

289976849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 62.

The square root of 289976849 is about 17028.7066155947. The cubic root of 289976849 is about 661.8929806647.

The spelling of 289976849 in words is "two hundred eighty-nine million, nine hundred seventy-six thousand, eight hundred forty-nine".