989120423 has 2 divisors, whose sum is σ = 989120424. Its totient is φ = 989120422.

The previous prime is 989120413. The next prime is 989120453. The reversal of 989120423 is 324021989.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989120423 is a prime.

It is a super-2 number, since 2×989120423² = 1956718422391397858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989120413) 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, 494560211 + 494560212.

It is an arithmetic number, because the mean of its divisors is an integer number (494560212).

Almost surely, 2^989120423 is an apocalyptic number.

989120423 is a deficient number, since it is larger than the sum of its proper divisors (1).

989120423 is an equidigital number, since it uses as much as digits as its factorization.

989120423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 989120423 is about 31450.2849430653. The cubic root of 989120423 is about 996.3602425722.

The spelling of 989120423 in words is "nine hundred eighty-nine million, one hundred twenty thousand, four hundred twenty-three".