72947011 has 2 divisors, whose sum is σ = 72947012. Its totient is φ = 72947010.

The previous prime is 72947009. The next prime is 72947041. The reversal of 72947011 is 11074927.

It is a weak prime.

It is an emirp because it is prime and its reverse (11074927) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72947011 - 2¹ = 72947009 is a prime.

Together with 72947009, 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 (72947041) 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, 36473505 + 36473506.

It is an arithmetic number, because the mean of its divisors is an integer number (36473506).

Almost surely, 2^72947011 is an apocalyptic number.

72947011 is a deficient number, since it is larger than the sum of its proper divisors (1).

72947011 is an equidigital number, since it uses as much as digits as its factorization.

72947011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 72947011 is about 8540.9022357126. The cubic root of 72947011 is about 417.8327723275.

The spelling of 72947011 in words is "seventy-two million, nine hundred forty-seven thousand, eleven".