40813823 has 2 divisors, whose sum is σ = 40813824. Its totient is φ = 40813822.

The previous prime is 40813783. The next prime is 40813831. The reversal of 40813823 is 32831804.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40813823 - 2¹⁶ = 40748287 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40813873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20406911 + 20406912.

It is an arithmetic number, because the mean of its divisors is an integer number (20406912).

Almost surely, 2^40813823 is an apocalyptic number.

40813823 is a deficient number, since it is larger than the sum of its proper divisors (1).

40813823 is an equidigital number, since it uses as much as digits as its factorization.

40813823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 40813823 is about 6388.5697147327. The cubic root of 40813823 is about 344.2989980863.

The spelling of 40813823 in words is "forty million, eight hundred thirteen thousand, eight hundred twenty-three".