1152209689 has 2 divisors, whose sum is σ = 1152209690. Its totient is φ = 1152209688.

The previous prime is 1152209687. The next prime is 1152209777. The reversal of 1152209689 is 9869022511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1150227225 + 1982464 = 33915^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 1152209689 - 2¹ = 1152209687 is a prime.

Together with 1152209687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1152209687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576104844 + 576104845.

It is an arithmetic number, because the mean of its divisors is an integer number (576104845).

Almost surely, 2^1152209689 is an apocalyptic number.

It is an amenable number.

1152209689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1152209689 is an equidigital number, since it uses as much as digits as its factorization.

1152209689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 1152209689 is about 33944.2143671053. The cubic root of 1152209689 is about 1048.3601580658.

The spelling of 1152209689 in words is "one billion, one hundred fifty-two million, two hundred nine thousand, six hundred eighty-nine".