100688839 has 2 divisors, whose sum is σ = 100688840. Its totient is φ = 100688838.

The previous prime is 100688831. The next prime is 100688881. The reversal of 100688839 is 938886001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100688839 - 2³ = 100688831 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 100688795 and 100688804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100688831) 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, 50344419 + 50344420.

It is an arithmetic number, because the mean of its divisors is an integer number (50344420).

Almost surely, 2^100688839 is an apocalyptic number.

100688839 is a deficient number, since it is larger than the sum of its proper divisors (1).

100688839 is an equidigital number, since it uses as much as digits as its factorization.

100688839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 100688839 is about 10034.3828410122. The cubic root of 100688839 is about 465.2222146758. Note that the first 4 decimals are identical.

The spelling of 100688839 in words is "one hundred million, six hundred eighty-eight thousand, eight hundred thirty-nine".