100839857 has 2 divisors, whose sum is σ = 100839858. Its totient is φ = 100839856.

The previous prime is 100839841. The next prime is 100839877. The reversal of 100839857 is 758938001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93528241 + 7311616 = 9671^2 + 2704^2 .

It is a cyclic number.

It is not a de Polignac number, because 100839857 - 2⁴ = 100839841 is a prime.

It is not a weakly prime, because it can be changed into another prime (100839877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50419928 + 50419929.

It is an arithmetic number, because the mean of its divisors is an integer number (50419929).

Almost surely, 2^100839857 is an apocalyptic number.

It is an amenable number.

100839857 is a deficient number, since it is larger than the sum of its proper divisors (1).

100839857 is an equidigital number, since it uses as much as digits as its factorization.

100839857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 100839857 is about 10041.9050483462. The cubic root of 100839857 is about 465.4546860978.

The spelling of 100839857 in words is "one hundred million, eight hundred thirty-nine thousand, eight hundred fifty-seven".