1153621289 has 2 divisors, whose sum is σ = 1153621290. Its totient is φ = 1153621288.

The previous prime is 1153621219. The next prime is 1153621331. The reversal of 1153621289 is 9821263511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1153621225 + 64 = 33965^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153621289 - 2⁸ = 1153621033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1153621219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576810644 + 576810645.

It is an arithmetic number, because the mean of its divisors is an integer number (576810645).

Almost surely, 2^1153621289 is an apocalyptic number.

It is an amenable number.

1153621289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153621289 is an equidigital number, since it uses as much as digits as its factorization.

1153621289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 1153621289 is about 33965.0009421463. Note that the first 3 decimals coincide. The cubic root of 1153621289 is about 1048.7881071578.

The spelling of 1153621289 in words is "one billion, one hundred fifty-three million, six hundred twenty-one thousand, two hundred eighty-nine".