11431431289 has 2 divisors, whose sum is σ = 11431431290. Its totient is φ = 11431431288.

The previous prime is 11431431287. The next prime is 11431431313. The reversal of 11431431289 is 98213413411.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11377848889 + 53582400 = 106667^2 + 7320^2 .

It is a cyclic number.

It is not a de Polignac number, because 11431431289 - 2¹ = 11431431287 is a prime.

Together with 11431431287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11431431281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5715715644 + 5715715645.

It is an arithmetic number, because the mean of its divisors is an integer number (5715715645).

Almost surely, 2^11431431289 is an apocalyptic number.

It is an amenable number.

11431431289 is a deficient number, since it is larger than the sum of its proper divisors (1).

11431431289 is an equidigital number, since it uses as much as digits as its factorization.

11431431289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The spelling of 11431431289 in words is "eleven billion, four hundred thirty-one million, four hundred thirty-one thousand, two hundred eighty-nine".