100947839 has 2 divisors, whose sum is σ = 100947840. Its totient is φ = 100947838.

The previous prime is 100947827. The next prime is 100947841. The reversal of 100947839 is 938749001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100947839 - 2⁴ = 100947823 is a prime.

Together with 100947841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 100947796 and 100947805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100947809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50473919 + 50473920.

It is an arithmetic number, because the mean of its divisors is an integer number (50473920).

Almost surely, 2^100947839 is an apocalyptic number.

100947839 is a deficient number, since it is larger than the sum of its proper divisors (1).

100947839 is an equidigital number, since it uses as much as digits as its factorization.

100947839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 100947839 is about 10047.2801792326. The cubic root of 100947839 is about 465.6207672483.

The spelling of 100947839 in words is "one hundred million, nine hundred forty-seven thousand, eight hundred thirty-nine".