100340321 has 2 divisors, whose sum is σ = 100340322. Its totient is φ = 100340320.

The previous prime is 100340299. The next prime is 100340351. The reversal of 100340321 is 123043001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96805921 + 3534400 = 9839^2 + 1880^2 .

It is an emirp because it is prime and its reverse (123043001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100340321 - 2⁶ = 100340257 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100340296 and 100340305.

It is not a weakly prime, because it can be changed into another prime (100340351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50170160 + 50170161.

It is an arithmetic number, because the mean of its divisors is an integer number (50170161).

Almost surely, 2^100340321 is an apocalyptic number.

It is an amenable number.

100340321 is a deficient number, since it is larger than the sum of its proper divisors (1).

100340321 is an equidigital number, since it uses as much as digits as its factorization.

100340321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 100340321 is about 10017.0015972845. The cubic root of 100340321 is about 464.6848305600.

Adding to 100340321 its reverse (123043001), we get a palindrome (223383322).

The spelling of 100340321 in words is "one hundred million, three hundred forty thousand, three hundred twenty-one".