72399011 has 2 divisors, whose sum is σ = 72399012. Its totient is φ = 72399010.

The previous prime is 72399001. The next prime is 72399013. The reversal of 72399011 is 11099327.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (11099327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72399011 - 2⁶ = 72398947 is a prime.

Together with 72399013, 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 (72399013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36199505 + 36199506.

It is an arithmetic number, because the mean of its divisors is an integer number (36199506).

Almost surely, 2^72399011 is an apocalyptic number.

72399011 is a deficient number, since it is larger than the sum of its proper divisors (1).

72399011 is an equidigital number, since it uses as much as digits as its factorization.

72399011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 72399011 is about 8508.7608381009. The cubic root of 72399011 is about 416.7838459403.

The spelling of 72399011 in words is "seventy-two million, three hundred ninety-nine thousand, eleven".