72255439 has 2 divisors, whose sum is σ = 72255440. Its totient is φ = 72255438.

The previous prime is 72255433. The next prime is 72255467. The reversal of 72255439 is 93455227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72255439 - 2³ = 72255431 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72255398 and 72255407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72255431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36127719 + 36127720.

It is an arithmetic number, because the mean of its divisors is an integer number (36127720).

Almost surely, 2^72255439 is an apocalyptic number.

72255439 is a deficient number, since it is larger than the sum of its proper divisors (1).

72255439 is an equidigital number, since it uses as much as digits as its factorization.

72255439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 37.

The square root of 72255439 is about 8500.3199351554. The cubic root of 72255439 is about 416.5081603672.

The spelling of 72255439 in words is "seventy-two million, two hundred fifty-five thousand, four hundred thirty-nine".