100340257 has 2 divisors, whose sum is σ = 100340258. Its totient is φ = 100340256.

The previous prime is 100340249. The next prime is 100340267. The reversal of 100340257 is 752043001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97436641 + 2903616 = 9871^2 + 1704^2 .

It is an emirp because it is prime and its reverse (752043001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100340257 - 2³ = 100340249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100340267) 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, 50170128 + 50170129.

It is an arithmetic number, because the mean of its divisors is an integer number (50170129).

Almost surely, 2^100340257 is an apocalyptic number.

It is an amenable number.

100340257 is a deficient number, since it is larger than the sum of its proper divisors (1).

100340257 is an equidigital number, since it uses as much as digits as its factorization.

100340257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 100340257 is about 10016.9984027153. The cubic root of 100340257 is about 464.6847317634.

Adding to 100340257 its reverse (752043001), we get a palindrome (852383258).

The spelling of 100340257 in words is "one hundred million, three hundred forty thousand, two hundred fifty-seven".