100400423993 has 2 divisors, whose sum is σ = 100400423994. Its totient is φ = 100400423992.

The previous prime is 100400423969. The next prime is 100400424011. The reversal of 100400423993 is 399324004001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63125557504 + 37274866489 = 251248^2 + 193067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100400423993 is a prime.

It is not a weakly prime, because it can be changed into another prime (100400423953) 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, 50200211996 + 50200211997.

It is an arithmetic number, because the mean of its divisors is an integer number (50200211997).

Almost surely, 2^100400423993 is an apocalyptic number.

It is an amenable number.

100400423993 is a deficient number, since it is larger than the sum of its proper divisors (1).

100400423993 is an equidigital number, since it uses as much as digits as its factorization.

100400423993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

Adding to 100400423993 its reverse (399324004001), we get a palindrome (499724427994).

The spelling of 100400423993 in words is "one hundred billion, four hundred million, four hundred twenty-three thousand, nine hundred ninety-three".