100243342457 has 2 divisors, whose sum is σ = 100243342458. Its totient is φ = 100243342456.

The previous prime is 100243342421. The next prime is 100243342469. The reversal of 100243342457 is 754243342001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81969980416 + 18273362041 = 286304^2 + 135179^2 .

It is an emirp because it is prime and its reverse (754243342001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100243342457 - 2¹⁰ = 100243341433 is a prime.

It is not a weakly prime, because it can be changed into another prime (100243342487) 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, 50121671228 + 50121671229.

It is an arithmetic number, because the mean of its divisors is an integer number (50121671229).

Almost surely, 2^100243342457 is an apocalyptic number.

It is an amenable number.

100243342457 is a deficient number, since it is larger than the sum of its proper divisors (1).

100243342457 is an equidigital number, since it uses as much as digits as its factorization.

100243342457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 35.

Adding to 100243342457 its reverse (754243342001), we get a palindrome (854486684458).

The spelling of 100243342457 in words is "one hundred billion, two hundred forty-three million, three hundred forty-two thousand, four hundred fifty-seven".