400040003983 has 2 divisors, whose sum is σ = 400040003984. Its totient is φ = 400040003982.

The previous prime is 400040003981. The next prime is 400040004097. The reversal of 400040003983 is 389300040004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400040003983 - 2¹ = 400040003981 is a prime.

Together with 400040003981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400040003981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200020001991 + 200020001992.

It is an arithmetic number, because the mean of its divisors is an integer number (200020001992).

Almost surely, 2^400040003983 is an apocalyptic number.

400040003983 is a deficient number, since it is larger than the sum of its proper divisors (1).

400040003983 is an equidigital number, since it uses as much as digits as its factorization.

400040003983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 400040003983 its reverse (389300040004), we get a palindrome (789340043987).

The spelling of 400040003983 in words is "four hundred billion, forty million, three thousand, nine hundred eighty-three".