72847213 has 2 divisors, whose sum is σ = 72847214. Its totient is φ = 72847212.

The previous prime is 72847183. The next prime is 72847223. The reversal of 72847213 is 31274827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68194564 + 4652649 = 8258^2 + 2157^2 .

It is a cyclic number.

It is not a de Polignac number, because 72847213 - 2⁹ = 72846701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72847223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36423606 + 36423607.

It is an arithmetic number, because the mean of its divisors is an integer number (36423607).

Almost surely, 2^72847213 is an apocalyptic number.

It is an amenable number.

72847213 is a deficient number, since it is larger than the sum of its proper divisors (1).

72847213 is an equidigital number, since it uses as much as digits as its factorization.

72847213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 34.

The square root of 72847213 is about 8535.0578791242. The cubic root of 72847213 is about 417.6421412341.

The spelling of 72847213 in words is "seventy-two million, eight hundred forty-seven thousand, two hundred thirteen".