72440143 has 2 divisors, whose sum is σ = 72440144. Its totient is φ = 72440142.

The previous prime is 72440131. The next prime is 72440161. The reversal of 72440143 is 34104427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72440143 - 2¹⁷ = 72309071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72440243) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36220071 + 36220072.

It is an arithmetic number, because the mean of its divisors is an integer number (36220072).

Almost surely, 2^72440143 is an apocalyptic number.

72440143 is a deficient number, since it is larger than the sum of its proper divisors (1).

72440143 is an equidigital number, since it uses as much as digits as its factorization.

72440143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 72440143 is about 8511.1775331032. The cubic root of 72440143 is about 416.8627600370.

The spelling of 72440143 in words is "seventy-two million, four hundred forty thousand, one hundred forty-three".