72903443 has 2 divisors, whose sum is σ = 72903444. Its totient is φ = 72903442.

The previous prime is 72903427. The next prime is 72903469. The reversal of 72903443 is 34430927.

It is a weak prime.

It is an emirp because it is prime and its reverse (34430927) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72903443 - 2⁴ = 72903427 is a prime.

It is not a weakly prime, because it can be changed into another prime (72903403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36451721 + 36451722.

It is an arithmetic number, because the mean of its divisors is an integer number (36451722).

Almost surely, 2^72903443 is an apocalyptic number.

72903443 is a deficient number, since it is larger than the sum of its proper divisors (1).

72903443 is an equidigital number, since it uses as much as digits as its factorization.

72903443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 72903443 is about 8538.3513045552. The cubic root of 72903443 is about 417.7495714609.

The spelling of 72903443 in words is "seventy-two million, nine hundred three thousand, four hundred forty-three".