40116509 has 2 divisors, whose sum is σ = 40116510. Its totient is φ = 40116508.

The previous prime is 40116499. The next prime is 40116529. The reversal of 40116509 is 90561104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23551609 + 16564900 = 4853^2 + 4070^2 .

It is a cyclic number.

It is not a de Polignac number, because 40116509 - 2⁸ = 40116253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40116529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20058254 + 20058255.

It is an arithmetic number, because the mean of its divisors is an integer number (20058255).

Almost surely, 2^40116509 is an apocalyptic number.

It is an amenable number.

40116509 is a deficient number, since it is larger than the sum of its proper divisors (1).

40116509 is an equidigital number, since it uses as much as digits as its factorization.

40116509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 40116509 is about 6333.7594681200. The cubic root of 40116509 is about 342.3269134491.

The spelling of 40116509 in words is "forty million, one hundred sixteen thousand, five hundred nine".