72503503 has 2 divisors, whose sum is σ = 72503504. Its totient is φ = 72503502.

The previous prime is 72503491. The next prime is 72503531. The reversal of 72503503 is 30530527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72503503 - 2⁵ = 72503471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72503533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36251751 + 36251752.

It is an arithmetic number, because the mean of its divisors is an integer number (36251752).

Almost surely, 2^72503503 is an apocalyptic number.

72503503 is a deficient number, since it is larger than the sum of its proper divisors (1).

72503503 is an equidigital number, since it uses as much as digits as its factorization.

72503503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150, while the sum is 25.

The square root of 72503503 is about 8514.8988837214. The cubic root of 72503503 is about 416.9842613969.

The spelling of 72503503 in words is "seventy-two million, five hundred three thousand, five hundred three".