1311002089 has 2 divisors, whose sum is σ = 1311002090. Its totient is φ = 1311002088.

The previous prime is 1311002087. The next prime is 1311002153. The reversal of 1311002089 is 9802001131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1115226025 + 195776064 = 33395^2 + 13992^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311002089 - 2¹ = 1311002087 is a prime.

Together with 1311002087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1311002081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655501044 + 655501045.

It is an arithmetic number, because the mean of its divisors is an integer number (655501045).

Almost surely, 2^1311002089 is an apocalyptic number.

It is an amenable number.

1311002089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311002089 is an equidigital number, since it uses as much as digits as its factorization.

1311002089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1311002089 is about 36207.7628278799. The cubic root of 1311002089 is about 1094.4631102358.

The spelling of 1311002089 in words is "one billion, three hundred eleven million, two thousand, eighty-nine".