40863881 has 2 divisors, whose sum is σ = 40863882. Its totient is φ = 40863880.

The previous prime is 40863853. The next prime is 40863883. The reversal of 40863881 is 18836804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37100281 + 3763600 = 6091^2 + 1940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40863881 is a prime.

It is a super-2 number, since 2×40863881² = 3339713540764322, which contains 22 as substring.

Together with 40863883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40863883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20431940 + 20431941.

It is an arithmetic number, because the mean of its divisors is an integer number (20431941).

Almost surely, 2^40863881 is an apocalyptic number.

It is an amenable number.

40863881 is a deficient number, since it is larger than the sum of its proper divisors (1).

40863881 is an equidigital number, since it uses as much as digits as its factorization.

40863881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 40863881 is about 6392.4862925156. The cubic root of 40863881 is about 344.4397010523.

The spelling of 40863881 in words is "forty million, eight hundred sixty-three thousand, eight hundred eighty-one".