1199400689 has 2 divisors, whose sum is σ = 1199400690. Its totient is φ = 1199400688.

The previous prime is 1199400659. The next prime is 1199400751. The reversal of 1199400689 is 9860049911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624600064 + 574800625 = 24992^2 + 23975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1199400689 - 2¹⁶ = 1199335153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1199400649) 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, 599700344 + 599700345.

It is an arithmetic number, because the mean of its divisors is an integer number (599700345).

Almost surely, 2^1199400689 is an apocalyptic number.

It is an amenable number.

1199400689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199400689 is an equidigital number, since it uses as much as digits as its factorization.

1199400689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 1199400689 is about 34632.3647618813. The cubic root of 1199400689 is about 1062.4816333434.

The spelling of 1199400689 in words is "one billion, one hundred ninety-nine million, four hundred thousand, six hundred eighty-nine".