72647 has 2 divisors, whose sum is σ = 72648. Its totient is φ = 72646.

The previous prime is 72643. The next prime is 72649. The reversal of 72647 is 74627.

It is a strong prime.

72647 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 72647 - 2² = 72643 is a prime.

Together with 72649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 72647.

It is not a weakly prime, because it can be changed into another prime (72643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36323 + 36324.

It is an arithmetic number, because the mean of its divisors is an integer number (36324).

2⁷²⁶⁴⁷ is an apocalyptic number.

72647 is a deficient number, since it is larger than the sum of its proper divisors (1).

72647 is an equidigital number, since it uses as much as digits as its factorization.

72647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 26.

The square root of 72647 is about 269.5310742753. The cubic root of 72647 is about 41.7259174820.

The spelling of 72647 in words is "seventy-two thousand, six hundred forty-seven".