72796439 has 2 divisors, whose sum is σ = 72796440. Its totient is φ = 72796438.

The previous prime is 72796421. The next prime is 72796441. The reversal of 72796439 is 93469727.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72796439 is a prime.

Together with 72796441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72796393 and 72796402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72796459) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36398219 + 36398220.

It is an arithmetic number, because the mean of its divisors is an integer number (36398220).

Almost surely, 2^72796439 is an apocalyptic number.

72796439 is a deficient number, since it is larger than the sum of its proper divisors (1).

72796439 is an equidigital number, since it uses as much as digits as its factorization.

72796439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 47.

The square root of 72796439 is about 8532.0829227100. The cubic root of 72796439 is about 417.5450874610.

The spelling of 72796439 in words is "seventy-two million, seven hundred ninety-six thousand, four hundred thirty-nine".