40994563 has 2 divisors, whose sum is σ = 40994564. Its totient is φ = 40994562.

The previous prime is 40994561. The next prime is 40994581. The reversal of 40994563 is 36549904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40994563 - 2¹ = 40994561 is a prime.

Together with 40994561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40994561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20497281 + 20497282.

It is an arithmetic number, because the mean of its divisors is an integer number (20497282).

Almost surely, 2^40994563 is an apocalyptic number.

40994563 is a deficient number, since it is larger than the sum of its proper divisors (1).

40994563 is an equidigital number, since it uses as much as digits as its factorization.

40994563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 40994563 is about 6402.6996649851. The cubic root of 40994563 is about 344.8064811229.

The spelling of 40994563 in words is "forty million, nine hundred ninety-four thousand, five hundred sixty-three".