72728203 has 2 divisors, whose sum is σ = 72728204. Its totient is φ = 72728202.

The previous prime is 72728177. The next prime is 72728207. The reversal of 72728203 is 30282727.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72728203 is a prime.

It is equal to p_4269037 and since 72728203 and 4269037 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (72728207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36364101 + 36364102.

It is an arithmetic number, because the mean of its divisors is an integer number (36364102).

Almost surely, 2^72728203 is an apocalyptic number.

72728203 is a deficient number, since it is larger than the sum of its proper divisors (1).

72728203 is an equidigital number, since it uses as much as digits as its factorization.

72728203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 72728203 is about 8528.0831961233. The cubic root of 72728203 is about 417.4145842209.

The spelling of 72728203 in words is "seventy-two million, seven hundred twenty-eight thousand, two hundred three".