40523509 has 8 divisors (see below), whose sum is σ = 43690752. Its totient is φ = 37363440.

The previous prime is 40523477. The next prime is 40523513. The reversal of 40523509 is 90532504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40523509 - 2⁵ = 40523477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40523579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18612 + ... + 20674.

It is an arithmetic number, because the mean of its divisors is an integer number (5461344).

Almost surely, 2^40523509 is an apocalyptic number.

It is an amenable number.

40523509 is a deficient number, since it is larger than the sum of its proper divisors (3167243).

40523509 is a wasteful number, since it uses less digits than its factorization.

40523509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3587.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 40523509 is about 6365.8078041989. The cubic root of 40523509 is about 343.4807070420.

The spelling of 40523509 in words is "forty million, five hundred twenty-three thousand, five hundred nine".