1000134209 has 2 divisors, whose sum is σ = 1000134210. Its totient is φ = 1000134208.

The previous prime is 1000134203. The next prime is 1000134211. The reversal of 1000134209 is 9024310001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543029809 + 457104400 = 23303^2 + 21380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000134209 is a prime.

Together with 1000134211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1000134203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500067104 + 500067105.

It is an arithmetic number, because the mean of its divisors is an integer number (500067105).

Almost surely, 2^1000134209 is an apocalyptic number.

It is an amenable number.

1000134209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000134209 is an equidigital number, since it uses as much as digits as its factorization.

1000134209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1000134209 is about 31624.8985611021. The cubic root of 1000134209 is about 1000.0447343321.

The spelling of 1000134209 in words is "one billion, one hundred thirty-four thousand, two hundred nine".