989483021 has 2 divisors, whose sum is σ = 989483022. Its totient is φ = 989483020.

The previous prime is 989483009. The next prime is 989483029. The reversal of 989483021 is 120384989.

It is a happy number.

989483021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748022500 + 241460521 = 27350^2 + 15539^2 .

It is a cyclic number.

It is not a de Polignac number, because 989483021 - 2²⁶ = 922374157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989483029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494741510 + 494741511.

It is an arithmetic number, because the mean of its divisors is an integer number (494741511).

Almost surely, 2^989483021 is an apocalyptic number.

It is an amenable number.

989483021 is a deficient number, since it is larger than the sum of its proper divisors (1).

989483021 is an equidigital number, since it uses as much as digits as its factorization.

989483021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 989483021 is about 31456.0490367115. The cubic root of 989483021 is about 996.4819783707.

The spelling of 989483021 in words is "nine hundred eighty-nine million, four hundred eighty-three thousand, twenty-one".