72523523 has 2 divisors, whose sum is σ = 72523524. Its totient is φ = 72523522.

The previous prime is 72523511. The next prime is 72523537. The reversal of 72523523 is 32532527.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (32532527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72523523 - 2⁸ = 72523267 is a prime.

It is a super-2 number, since 2×72523523² = 10519322776663058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72523723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36261761 + 36261762.

It is an arithmetic number, because the mean of its divisors is an integer number (36261762).

Almost surely, 2^72523523 is an apocalyptic number.

72523523 is a deficient number, since it is larger than the sum of its proper divisors (1).

72523523 is an equidigital number, since it uses as much as digits as its factorization.

72523523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 29.

The square root of 72523523 is about 8516.0743890598. The cubic root of 72523523 is about 417.0226377342.

The spelling of 72523523 in words is "seventy-two million, five hundred twenty-three thousand, five hundred twenty-three".