72855427 has 2 divisors, whose sum is σ = 72855428. Its totient is φ = 72855426.

The previous prime is 72855371. The next prime is 72855437. The reversal of 72855427 is 72455827.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (72455827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72855427 - 2¹⁹ = 72331139 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 72855427.

It is not a weakly prime, because it can be changed into another prime (72855437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36427713 + 36427714.

It is an arithmetic number, because the mean of its divisors is an integer number (36427714).

Almost surely, 2^72855427 is an apocalyptic number.

72855427 is a deficient number, since it is larger than the sum of its proper divisors (1).

72855427 is an equidigital number, since it uses as much as digits as its factorization.

72855427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156800, while the sum is 40.

The square root of 72855427 is about 8535.5390573765. The cubic root of 72855427 is about 417.6578379390.

The spelling of 72855427 in words is "seventy-two million, eight hundred fifty-five thousand, four hundred twenty-seven".