1201136009 has 2 divisors, whose sum is σ = 1201136010. Its totient is φ = 1201136008.

The previous prime is 1201135997. The next prime is 1201136011. The reversal of 1201136009 is 9006311021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1112022409 + 89113600 = 33347^2 + 9440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201136009 is a prime.

Together with 1201136011, 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 (1201130009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600568004 + 600568005.

It is an arithmetic number, because the mean of its divisors is an integer number (600568005).

Almost surely, 2^1201136009 is an apocalyptic number.

It is an amenable number.

1201136009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201136009 is an equidigital number, since it uses as much as digits as its factorization.

1201136009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1201136009 is about 34657.4091501370. The cubic root of 1201136009 is about 1062.9937938938.

The spelling of 1201136009 in words is "one billion, two hundred one million, one hundred thirty-six thousand, nine".