40539523 has 2 divisors, whose sum is σ = 40539524. Its totient is φ = 40539522.

The previous prime is 40539517. The next prime is 40539553. The reversal of 40539523 is 32593504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40539523 - 2¹³ = 40531331 is a prime.

It is not a weakly prime, because it can be changed into another prime (40539553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20269761 + 20269762.

It is an arithmetic number, because the mean of its divisors is an integer number (20269762).

Almost surely, 2^40539523 is an apocalyptic number.

40539523 is a deficient number, since it is larger than the sum of its proper divisors (1).

40539523 is an equidigital number, since it uses as much as digits as its factorization.

40539523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 40539523 is about 6367.0654936163. The cubic root of 40539523 is about 343.5259464251.

The spelling of 40539523 in words is "forty million, five hundred thirty-nine thousand, five hundred twenty-three".