72445427 has 2 divisors, whose sum is σ = 72445428. Its totient is φ = 72445426.

The previous prime is 72445409. The next prime is 72445447. The reversal of 72445427 is 72454427.

It is a weak prime.

It is an emirp because it is prime and its reverse (72454427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72445427 - 2¹⁴ = 72429043 is a prime.

It is not a weakly prime, because it can be changed into another prime (72445447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36222713 + 36222714.

It is an arithmetic number, because the mean of its divisors is an integer number (36222714).

Almost surely, 2^72445427 is an apocalyptic number.

72445427 is a deficient number, since it is larger than the sum of its proper divisors (1).

72445427 is an equidigital number, since it uses as much as digits as its factorization.

72445427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 35.

The square root of 72445427 is about 8511.4879427748. The cubic root of 72445427 is about 416.8728955281.

The spelling of 72445427 in words is "seventy-two million, four hundred forty-five thousand, four hundred twenty-seven".