72547247 has 2 divisors, whose sum is σ = 72547248. Its totient is φ = 72547246.

The previous prime is 72547219. The next prime is 72547259. The reversal of 72547247 is 74274527.

It is a strong prime.

It is an emirp because it is prime and its reverse (74274527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72547247 - 2¹⁶ = 72481711 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72547247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72547207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36273623 + 36273624.

It is an arithmetic number, because the mean of its divisors is an integer number (36273624).

Almost surely, 2^72547247 is an apocalyptic number.

72547247 is a deficient number, since it is larger than the sum of its proper divisors (1).

72547247 is an equidigital number, since it uses as much as digits as its factorization.

72547247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109760, while the sum is 38.

The square root of 72547247 is about 8517.4671704680. The cubic root of 72547247 is about 417.0681051268.

The spelling of 72547247 in words is "seventy-two million, five hundred forty-seven thousand, two hundred forty-seven".