72304523 has 2 divisors, whose sum is σ = 72304524. Its totient is φ = 72304522.

The previous prime is 72304469. The next prime is 72304567. The reversal of 72304523 is 32540327.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72304523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72304492 and 72304501.

It is not a weakly prime, because it can be changed into another prime (72303523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36152261 + 36152262.

It is an arithmetic number, because the mean of its divisors is an integer number (36152262).

Almost surely, 2^72304523 is an apocalyptic number.

72304523 is a deficient number, since it is larger than the sum of its proper divisors (1).

72304523 is an equidigital number, since it uses as much as digits as its factorization.

72304523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 72304523 is about 8503.2066304424. The cubic root of 72304523 is about 416.6024520418.

It can be divided in two parts, 72304 and 523, that added together give a palindrome (72827).

The spelling of 72304523 in words is "seventy-two million, three hundred four thousand, five hundred twenty-three".