72297143 has 2 divisors, whose sum is σ = 72297144. Its totient is φ = 72297142.

The previous prime is 72297133. The next prime is 72297151. The reversal of 72297143 is 34179227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72297143 - 2⁶ = 72297079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72297133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36148571 + 36148572.

It is an arithmetic number, because the mean of its divisors is an integer number (36148572).

Almost surely, 2^72297143 is an apocalyptic number.

72297143 is a deficient number, since it is larger than the sum of its proper divisors (1).

72297143 is an equidigital number, since it uses as much as digits as its factorization.

72297143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 72297143 is about 8502.7726654310. The cubic root of 72297143 is about 416.5882775911.

The spelling of 72297143 in words is "seventy-two million, two hundred ninety-seven thousand, one hundred forty-three".