100028389 has 2 divisors, whose sum is σ = 100028390. Its totient is φ = 100028388.

The previous prime is 100028381. The next prime is 100028393. The reversal of 100028389 is 983820001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91355364 + 8673025 = 9558^2 + 2945^2 .

It is an emirp because it is prime and its reverse (983820001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100028389 - 2³ = 100028381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100028389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100028381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50014194 + 50014195.

It is an arithmetic number, because the mean of its divisors is an integer number (50014195).

Almost surely, 2^100028389 is an apocalyptic number.

It is an amenable number.

100028389 is a deficient number, since it is larger than the sum of its proper divisors (1).

100028389 is an equidigital number, since it uses as much as digits as its factorization.

100028389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 100028389 is about 10001.4193492724. The cubic root of 100028389 is about 464.2028025606.

The spelling of 100028389 in words is "one hundred million, twenty-eight thousand, three hundred eighty-nine".