1249609289 has 2 divisors, whose sum is σ = 1249609290. Its totient is φ = 1249609288.

The previous prime is 1249609247. The next prime is 1249609303. The reversal of 1249609289 is 9829069421.

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., 900480064 + 349129225 = 30008^2 + 18685^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249609289 - 2¹² = 1249605193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1249609219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624804644 + 624804645.

It is an arithmetic number, because the mean of its divisors is an integer number (624804645).

Almost surely, 2^1249609289 is an apocalyptic number.

It is an amenable number.

1249609289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249609289 is an equidigital number, since it uses as much as digits as its factorization.

1249609289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 1249609289 is about 35349.8131395344. The cubic root of 1249609289 is about 1077.1050984759.

The spelling of 1249609289 in words is "one billion, two hundred forty-nine million, six hundred nine thousand, two hundred eighty-nine".