40734509 has 4 divisors (see below), whose sum is σ = 40748316. Its totient is φ = 40720704.

The previous prime is 40734503. The next prime is 40734517. The reversal of 40734509 is 90543704.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8868484 + 31866025 = 2978^2 + 5645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40734509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40734503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494 + ... + 9039.

It is an arithmetic number, because the mean of its divisors is an integer number (10187079).

Almost surely, 2^40734509 is an apocalyptic number.

It is an amenable number.

40734509 is a deficient number, since it is larger than the sum of its proper divisors (13807).

40734509 is an equidigital number, since it uses as much as digits as its factorization.

40734509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13806.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 40734509 is about 6382.3592033041. The cubic root of 40734509 is about 344.0758266459.

The spelling of 40734509 in words is "forty million, seven hundred thirty-four thousand, five hundred nine".