400103983 has 2 divisors, whose sum is σ = 400103984. Its totient is φ = 400103982.

The previous prime is 400103947. The next prime is 400104013. The reversal of 400103983 is 389301004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400103983 - 2⁹ = 400103471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400103183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200051991 + 200051992.

It is an arithmetic number, because the mean of its divisors is an integer number (200051992).

Almost surely, 2^400103983 is an apocalyptic number.

400103983 is a deficient number, since it is larger than the sum of its proper divisors (1).

400103983 is an equidigital number, since it uses as much as digits as its factorization.

400103983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 400103983 is about 20002.5994060772. The cubic root of 400103983 is about 736.8701403043.

Adding to 400103983 its reverse (389301004), we get a palindrome (789404987).

The spelling of 400103983 in words is "four hundred million, one hundred three thousand, nine hundred eighty-three".