72503203 has 16 divisors (see below), whose sum is σ = 77440000. Its totient is φ = 67767840.

The previous prime is 72503177. The next prime is 72503231. The reversal of 72503203 is 30230527.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72503203 - 2⁹ = 72502691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72503303) 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 in 15 ways as a sum of consecutive naturals, for example, 145048 + ... + 145546.

It is an arithmetic number, because the mean of its divisors is an integer number (4840000).

Almost surely, 2^72503203 is an apocalyptic number.

72503203 is a deficient number, since it is larger than the sum of its proper divisors (4936797).

72503203 is a wasteful number, since it uses less digits than its factorization.

72503203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682.

The product of its (nonzero) digits is 1260, while the sum is 22.

The square root of 72503203 is about 8514.8812675222. The cubic root of 72503203 is about 416.9836862732.

The spelling of 72503203 in words is "seventy-two million, five hundred three thousand, two hundred three".