40682909 has 2 divisors, whose sum is σ = 40682910. Its totient is φ = 40682908.

The previous prime is 40682893. The next prime is 40682923. The reversal of 40682909 is 90928604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38402809 + 2280100 = 6197^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 40682909 - 2⁴ = 40682893 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40681909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20341454 + 20341455.

It is an arithmetic number, because the mean of its divisors is an integer number (20341455).

Almost surely, 2^40682909 is an apocalyptic number.

It is an amenable number.

40682909 is a deficient number, since it is larger than the sum of its proper divisors (1).

40682909 is an equidigital number, since it uses as much as digits as its factorization.

40682909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 40682909 is about 6378.3155299813. The cubic root of 40682909 is about 343.9304804757.

The spelling of 40682909 in words is "forty million, six hundred eighty-two thousand, nine hundred nine".