100555439 has 2 divisors, whose sum is σ = 100555440. Its totient is φ = 100555438.

The previous prime is 100555421. The next prime is 100555447. The reversal of 100555439 is 934555001.

It is a strong prime.

It is an emirp because it is prime and its reverse (934555001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100555439 is a prime.

It is a super-2 number, since 2×100555439² = 20222792624965442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100555489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50277719 + 50277720.

It is an arithmetic number, because the mean of its divisors is an integer number (50277720).

Almost surely, 2^100555439 is an apocalyptic number.

100555439 is a deficient number, since it is larger than the sum of its proper divisors (1).

100555439 is an equidigital number, since it uses as much as digits as its factorization.

100555439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 100555439 is about 10027.7334926692. The cubic root of 100555439 is about 465.0166703084.

The spelling of 100555439 in words is "one hundred million, five hundred fifty-five thousand, four hundred thirty-nine".