40109863 has 2 divisors, whose sum is σ = 40109864. Its totient is φ = 40109862.

The previous prime is 40109837. The next prime is 40109891. The reversal of 40109863 is 36890104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40109863 - 2⁵ = 40109831 is a prime.

It is a super-2 number, since 2×40109863² = 3217602219757538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40109803) 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, 20054931 + 20054932.

It is an arithmetic number, because the mean of its divisors is an integer number (20054932).

Almost surely, 2^40109863 is an apocalyptic number.

40109863 is a deficient number, since it is larger than the sum of its proper divisors (1).

40109863 is an equidigital number, since it uses as much as digits as its factorization.

40109863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 40109863 is about 6333.2347974791. The cubic root of 40109863 is about 342.3080082621.

Adding to 40109863 its reverse (36890104), we get a palindrome (76999967).

The spelling of 40109863 in words is "forty million, one hundred nine thousand, eight hundred sixty-three".