1154222389 has 2 divisors, whose sum is σ = 1154222390. Its totient is φ = 1154222388.

The previous prime is 1154222387. The next prime is 1154222413. The reversal of 1154222389 is 9832224511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1119906225 + 34316164 = 33465^2 + 5858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1154222389 - 2¹ = 1154222387 is a prime.

Together with 1154222387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1154222387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577111194 + 577111195.

It is an arithmetic number, because the mean of its divisors is an integer number (577111195).

Almost surely, 2^1154222389 is an apocalyptic number.

It is an amenable number.

1154222389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154222389 is an equidigital number, since it uses as much as digits as its factorization.

1154222389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 1154222389 is about 33973.8486044781. The cubic root of 1154222389 is about 1048.9702342485.

The spelling of 1154222389 in words is "one billion, one hundred fifty-four million, two hundred twenty-two thousand, three hundred eighty-nine".