72009011 has 2 divisors, whose sum is σ = 72009012. Its totient is φ = 72009010.

The previous prime is 72008983. The next prime is 72009019. The reversal of 72009011 is 11090027.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72009011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72009019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36004505 + 36004506.

It is an arithmetic number, because the mean of its divisors is an integer number (36004506).

Almost surely, 2^72009011 is an apocalyptic number.

72009011 is a deficient number, since it is larger than the sum of its proper divisors (1).

72009011 is an equidigital number, since it uses as much as digits as its factorization.

72009011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 72009011 is about 8485.8123358934. The cubic root of 72009011 is about 416.0341191043.

Adding to 72009011 its reverse (11090027), we get a palindrome (83099038).

The spelling of 72009011 in words is "seventy-two million, nine thousand, eleven".