72442247 has 2 divisors, whose sum is σ = 72442248. Its totient is φ = 72442246.

The previous prime is 72442243. The next prime is 72442259. The reversal of 72442247 is 74224427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72442247 - 2² = 72442243 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72442241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36221123 + 36221124.

It is an arithmetic number, because the mean of its divisors is an integer number (36221124).

Almost surely, 2^72442247 is an apocalyptic number.

72442247 is a deficient number, since it is larger than the sum of its proper divisors (1).

72442247 is an equidigital number, since it uses as much as digits as its factorization.

72442247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 32.

The square root of 72442247 is about 8511.3011343742. The cubic root of 72442247 is about 416.8667958783.

The spelling of 72442247 in words is "seventy-two million, four hundred forty-two thousand, two hundred forty-seven".