40805893 has 2 divisors, whose sum is σ = 40805894. Its totient is φ = 40805892.

The previous prime is 40805851. The next prime is 40805953. The reversal of 40805893 is 39850804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34082244 + 6723649 = 5838^2 + 2593^2 .

It is a cyclic number.

It is not a de Polignac number, because 40805893 - 2²¹ = 38708741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40805803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20402946 + 20402947.

It is an arithmetic number, because the mean of its divisors is an integer number (20402947).

Almost surely, 2^40805893 is an apocalyptic number.

It is an amenable number.

40805893 is a deficient number, since it is larger than the sum of its proper divisors (1).

40805893 is an equidigital number, since it uses as much as digits as its factorization.

40805893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 40805893 is about 6387.9490448813. The cubic root of 40805893 is about 344.2766978973.

The spelling of 40805893 in words is "forty million, eight hundred five thousand, eight hundred ninety-three".