40697523 has 12 divisors (see below), whose sum is σ = 58858488. Its totient is φ = 27097920.

The previous prime is 40697509. The next prime is 40697533. The reversal of 40697523 is 32579604.

40697523 is a `hidden beast` number, since 40 + 6 + 97 + 523 = 666.

It is not a de Polignac number, because 40697523 - 2⁵ = 40697491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40697533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6411 + ... + 11067.

It is an arithmetic number, because the mean of its divisors is an integer number (4904874).

Almost surely, 2^40697523 is an apocalyptic number.

40697523 is a deficient number, since it is larger than the sum of its proper divisors (18160965).

40697523 is a wasteful number, since it uses less digits than its factorization.

40697523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5634 (or 5631 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 40697523 is about 6379.4610273910. The cubic root of 40697523 is about 343.9716574585.

The spelling of 40697523 in words is "forty million, six hundred ninety-seven thousand, five hundred twenty-three".