40011709 has 2 divisors, whose sum is σ = 40011710. Its totient is φ = 40011708.

The previous prime is 40011667. The next prime is 40011733. The reversal of 40011709 is 90711004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 6084 = 6325^2 + 78^2 .

It is a cyclic number.

It is not a de Polignac number, because 40011709 - 2⁷ = 40011581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40011709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40011749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20005854 + 20005855.

It is an arithmetic number, because the mean of its divisors is an integer number (20005855).

Almost surely, 2^40011709 is an apocalyptic number.

It is an amenable number.

40011709 is a deficient number, since it is larger than the sum of its proper divisors (1).

40011709 is an equidigital number, since it uses as much as digits as its factorization.

40011709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 40011709 is about 6325.4809303325. The cubic root of 40011709 is about 342.0285562604.

The spelling of 40011709 in words is "forty million, eleven thousand, seven hundred nine".