72656503 has 2 divisors, whose sum is σ = 72656504. Its totient is φ = 72656502.

The previous prime is 72656497. The next prime is 72656527. The reversal of 72656503 is 30565627.

It is a weak prime.

It is an emirp because it is prime and its reverse (30565627) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72656503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72656533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36328251 + 36328252.

It is an arithmetic number, because the mean of its divisors is an integer number (36328252).

Almost surely, 2^72656503 is an apocalyptic number.

72656503 is a deficient number, since it is larger than the sum of its proper divisors (1).

72656503 is an equidigital number, since it uses as much as digits as its factorization.

72656503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 72656503 is about 8523.8784012913. The cubic root of 72656503 is about 417.2773680058.

The spelling of 72656503 in words is "seventy-two million, six hundred fifty-six thousand, five hundred three".