100389449 has 2 divisors, whose sum is σ = 100389450. Its totient is φ = 100389448.

The previous prime is 100389397. The next prime is 100389461. The reversal of 100389449 is 944983001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60295225 + 40094224 = 7765^2 + 6332^2 .

It is an emirp because it is prime and its reverse (944983001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100389449 - 2⁸ = 100389193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100382449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50194724 + 50194725.

It is an arithmetic number, because the mean of its divisors is an integer number (50194725).

Almost surely, 2^100389449 is an apocalyptic number.

It is an amenable number.

100389449 is a deficient number, since it is larger than the sum of its proper divisors (1).

100389449 is an equidigital number, since it uses as much as digits as its factorization.

100389449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 100389449 is about 10019.4535280124. The cubic root of 100389449 is about 464.7606568790.

The spelling of 100389449 in words is "one hundred million, three hundred eighty-nine thousand, four hundred forty-nine".