1121658289 has 2 divisors, whose sum is σ = 1121658290. Its totient is φ = 1121658288.

The previous prime is 1121658281. The next prime is 1121658299. The reversal of 1121658289 is 9828561211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 775065600 + 346592689 = 27840^2 + 18617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121658289 - 2³ = 1121658281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121658281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560829144 + 560829145.

It is an arithmetic number, because the mean of its divisors is an integer number (560829145).

Almost surely, 2^1121658289 is an apocalyptic number.

It is an amenable number.

1121658289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121658289 is an equidigital number, since it uses as much as digits as its factorization.

1121658289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 43.

The square root of 1121658289 is about 33491.1673281180. The cubic root of 1121658289 is about 1039.0111066592.

The spelling of 1121658289 in words is "one billion, one hundred twenty-one million, six hundred fifty-eight thousand, two hundred eighty-nine".