1253791289 has 2 divisors, whose sum is σ = 1253791290. Its totient is φ = 1253791288.

The previous prime is 1253791237. The next prime is 1253791339. The reversal of 1253791289 is 9821973521.

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., 783552064 + 470239225 = 27992^2 + 21685^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253791289 - 2²⁴ = 1237014073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1253791229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626895644 + 626895645.

It is an arithmetic number, because the mean of its divisors is an integer number (626895645).

Almost surely, 2^1253791289 is an apocalyptic number.

It is an amenable number.

1253791289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253791289 is an equidigital number, since it uses as much as digits as its factorization.

1253791289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 1253791289 is about 35408.9153886419. The cubic root of 1253791289 is about 1078.3053237373.

The spelling of 1253791289 in words is "one billion, two hundred fifty-three million, seven hundred ninety-one thousand, two hundred eighty-nine".