100840247 has 2 divisors, whose sum is σ = 100840248. Its totient is φ = 100840246.

The previous prime is 100840237. The next prime is 100840273. The reversal of 100840247 is 742048001.

It is an a-pointer prime, because the next prime (100840273) can be obtained adding 100840247 to its sum of digits (26).

It is a weak prime.

It is an emirp because it is prime and its reverse (742048001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100840247 - 2⁴ = 100840231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100840217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50420123 + 50420124.

It is an arithmetic number, because the mean of its divisors is an integer number (50420124).

Almost surely, 2^100840247 is an apocalyptic number.

100840247 is a deficient number, since it is larger than the sum of its proper divisors (1).

100840247 is an equidigital number, since it uses as much as digits as its factorization.

100840247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 100840247 is about 10041.9244669535. The cubic root of 100840247 is about 465.4552861485.

Adding to 100840247 its reverse (742048001), we get a palindrome (842888248).

The spelling of 100840247 in words is "one hundred million, eight hundred forty thousand, two hundred forty-seven".