72438347 has 2 divisors, whose sum is σ = 72438348. Its totient is φ = 72438346.

The previous prime is 72438319. The next prime is 72438397. The reversal of 72438347 is 74383427.

It is a weak prime.

It is an emirp because it is prime and its reverse (74383427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72438347 - 2⁶ = 72438283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72438347.

It is not a weakly prime, because it can be changed into another prime (72438397) 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, 36219173 + 36219174.

It is an arithmetic number, because the mean of its divisors is an integer number (36219174).

Almost surely, 2^72438347 is an apocalyptic number.

72438347 is a deficient number, since it is larger than the sum of its proper divisors (1).

72438347 is an equidigital number, since it uses as much as digits as its factorization.

72438347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 38.

The square root of 72438347 is about 8511.0720241342. The cubic root of 72438347 is about 416.8593149320.

The spelling of 72438347 in words is "seventy-two million, four hundred thirty-eight thousand, three hundred forty-seven".