72384139 has 2 divisors, whose sum is σ = 72384140. Its totient is φ = 72384138.

The previous prime is 72384131. The next prime is 72384161. The reversal of 72384139 is 93148327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72384139 - 2³ = 72384131 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72384098 and 72384107.

It is not a weakly prime, because it can be changed into another prime (72384131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36192069 + 36192070.

It is an arithmetic number, because the mean of its divisors is an integer number (36192070).

Almost surely, 2^72384139 is an apocalyptic number.

72384139 is a deficient number, since it is larger than the sum of its proper divisors (1).

72384139 is an equidigital number, since it uses as much as digits as its factorization.

72384139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 72384139 is about 8507.8868704279. The cubic root of 72384139 is about 416.7553057999.

The spelling of 72384139 in words is "seventy-two million, three hundred eighty-four thousand, one hundred thirty-nine".