40341809 has 2 divisors, whose sum is σ = 40341810. Its totient is φ = 40341808.

The previous prime is 40341761. The next prime is 40341811. The reversal of 40341809 is 90814304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37173409 + 3168400 = 6097^2 + 1780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40341809 is a prime.

Together with 40341811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40341209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20170904 + 20170905.

It is an arithmetic number, because the mean of its divisors is an integer number (20170905).

Almost surely, 2^40341809 is an apocalyptic number.

It is an amenable number.

40341809 is a deficient number, since it is larger than the sum of its proper divisors (1).

40341809 is an equidigital number, since it uses as much as digits as its factorization.

40341809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40341809 is about 6351.5202117288. The cubic root of 40341809 is about 342.9665696267.

The spelling of 40341809 in words is "forty million, three hundred forty-one thousand, eight hundred nine".