72543353 has 2 divisors, whose sum is σ = 72543354. Its totient is φ = 72543352.

The previous prime is 72543323. The next prime is 72543397. The reversal of 72543353 is 35334527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53993104 + 18550249 = 7348^2 + 4307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72543353 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (72543323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36271676 + 36271677.

It is an arithmetic number, because the mean of its divisors is an integer number (36271677).

Almost surely, 2^72543353 is an apocalyptic number.

It is an amenable number.

72543353 is a deficient number, since it is larger than the sum of its proper divisors (1).

72543353 is an equidigital number, since it uses as much as digits as its factorization.

72543353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 32.

The square root of 72543353 is about 8517.2385783187. The cubic root of 72543353 is about 417.0606428989.

The spelling of 72543353 in words is "seventy-two million, five hundred forty-three thousand, three hundred fifty-three".