989357123 has 2 divisors, whose sum is σ = 989357124. Its totient is φ = 989357122.

The previous prime is 989357119. The next prime is 989357137. The reversal of 989357123 is 321753989.

989357123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989357123 - 2² = 989357119 is a prime.

It is not a weakly prime, because it can be changed into another prime (989357153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494678561 + 494678562.

It is an arithmetic number, because the mean of its divisors is an integer number (494678562).

Almost surely, 2^989357123 is an apocalyptic number.

989357123 is a deficient number, since it is larger than the sum of its proper divisors (1).

989357123 is an equidigital number, since it uses as much as digits as its factorization.

989357123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 989357123 is about 31454.0477999255. The cubic root of 989357123 is about 996.4397137380.

The spelling of 989357123 in words is "nine hundred eighty-nine million, three hundred fifty-seven thousand, one hundred twenty-three".