40117709 has 2 divisors, whose sum is σ = 40117710. Its totient is φ = 40117708.

The previous prime is 40117703. The next prime is 40117741. The reversal of 40117709 is 90771104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20448484 + 19669225 = 4522^2 + 4435^2 .

It is a cyclic number.

It is not a de Polignac number, because 40117709 - 2²⁰ = 39069133 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 (40117703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20058854 + 20058855.

It is an arithmetic number, because the mean of its divisors is an integer number (20058855).

Almost surely, 2^40117709 is an apocalyptic number.

It is an amenable number.

40117709 is a deficient number, since it is larger than the sum of its proper divisors (1).

40117709 is an equidigital number, since it uses as much as digits as its factorization.

40117709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 40117709 is about 6333.8541978798. The cubic root of 40117709 is about 342.3303267421.

The spelling of 40117709 in words is "forty million, one hundred seventeen thousand, seven hundred nine".