72767213 has 2 divisors, whose sum is σ = 72767214. Its totient is φ = 72767212.

The previous prime is 72767209. The next prime is 72767231. The reversal of 72767213 is 31276727.

Together with next prime (72767231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48135844 + 24631369 = 6938^2 + 4963^2 .

It is a cyclic number.

It is not a de Polignac number, because 72767213 - 2² = 72767209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72767713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36383606 + 36383607.

It is an arithmetic number, because the mean of its divisors is an integer number (36383607).

Almost surely, 2^72767213 is an apocalyptic number.

It is an amenable number.

72767213 is a deficient number, since it is larger than the sum of its proper divisors (1).

72767213 is an equidigital number, since it uses as much as digits as its factorization.

72767213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 35.

The square root of 72767213 is about 8530.3700388670. The cubic root of 72767213 is about 417.4892019151.

The spelling of 72767213 in words is "seventy-two million, seven hundred sixty-seven thousand, two hundred thirteen".