40663823 has 4 divisors (see below), whose sum is σ = 40899048. Its totient is φ = 40428600.

The previous prime is 40663811. The next prime is 40663837. The reversal of 40663823 is 32836604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40663823 - 2⁴ = 40663807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40663823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40663873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117353 + ... + 117698.

It is an arithmetic number, because the mean of its divisors is an integer number (10224762).

Almost surely, 2^40663823 is an apocalyptic number.

40663823 is a deficient number, since it is larger than the sum of its proper divisors (235225).

40663823 is a wasteful number, since it uses less digits than its factorization.

40663823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235224.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 40663823 is about 6376.8191914151. The cubic root of 40663823 is about 343.8766881577.

The spelling of 40663823 in words is "forty million, six hundred sixty-three thousand, eight hundred twenty-three".