100859489 has 2 divisors, whose sum is σ = 100859490. Its totient is φ = 100859488.

The previous prime is 100859431. The next prime is 100859491. The reversal of 100859489 is 984958001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54169600 + 46689889 = 7360^2 + 6833^2 .

It is a cyclic number.

It is not a de Polignac number, because 100859489 - 2¹² = 100855393 is a prime.

It is a super-2 number, since 2×100859489² = 20345273042682242, which contains 22 as substring.

Together with 100859491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100859189) 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, 50429744 + 50429745.

It is an arithmetic number, because the mean of its divisors is an integer number (50429745).

Almost surely, 2^100859489 is an apocalyptic number.

It is an amenable number.

100859489 is a deficient number, since it is larger than the sum of its proper divisors (1).

100859489 is an equidigital number, since it uses as much as digits as its factorization.

100859489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 100859489 is about 10042.8825045402. The cubic root of 100859489 is about 465.4848898080.

The spelling of 100859489 in words is "one hundred million, eight hundred fifty-nine thousand, four hundred eighty-nine".