100304381 has 2 divisors, whose sum is σ = 100304382. Its totient is φ = 100304380.

The previous prime is 100304371. The next prime is 100304383. The reversal of 100304381 is 183403001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99002500 + 1301881 = 9950^2 + 1141^2 .

It is a cyclic number.

It is not a de Polignac number, because 100304381 - 2¹⁸ = 100042237 is a prime.

It is a super-2 number, since 2×100304381² = 20121937695586322, which contains 22 as substring.

Together with 100304383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100304383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50152190 + 50152191.

It is an arithmetic number, because the mean of its divisors is an integer number (50152191).

Almost surely, 2^100304381 is an apocalyptic number.

It is an amenable number.

100304381 is a deficient number, since it is larger than the sum of its proper divisors (1).

100304381 is an equidigital number, since it uses as much as digits as its factorization.

100304381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 100304381 is about 10015.2074866175. The cubic root of 100304381 is about 464.6293435035.

Adding to 100304381 its reverse (183403001), we get a palindrome (283707382).

The spelling of 100304381 in words is "one hundred million, three hundred four thousand, three hundred eighty-one".