1129999999 has 2 divisors, whose sum is σ = 1130000000. Its totient is φ = 1129999998.

The previous prime is 1129999987. The next prime is 1130000009. The reversal of 1129999999 is 9999999211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1129999999 - 2¹¹ = 1129997951 is a prime.

1129999999 is a modest number, since divided by 99999 gives 11299 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1129999099) 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, 564999999 + 565000000.

It is an arithmetic number, because the mean of its divisors is an integer number (565000000).

Almost surely, 2^1129999999 is an apocalyptic number.

1129999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129999999 is an equidigital number, since it uses as much as digits as its factorization.

1129999999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9565938, while the sum is 67.

The square root of 1129999999 is about 33615.4726130691. The cubic root of 1129999999 is about 1041.5804369993.

The spelling of 1129999999 in words is "one billion, one hundred twenty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".