989105903 has 2 divisors, whose sum is σ = 989105904. Its totient is φ = 989105902.

The previous prime is 989105891. The next prime is 989105921. The reversal of 989105903 is 309501989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989105903 - 2⁶ = 989105839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989105303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494552951 + 494552952.

It is an arithmetic number, because the mean of its divisors is an integer number (494552952).

Almost surely, 2^989105903 is an apocalyptic number.

989105903 is a deficient number, since it is larger than the sum of its proper divisors (1).

989105903 is an equidigital number, since it uses as much as digits as its factorization.

989105903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 989105903 is about 31450.0541017023. The cubic root of 989105903 is about 996.3553671222.

The spelling of 989105903 in words is "nine hundred eighty-nine million, one hundred five thousand, nine hundred three".