989484973 has 2 divisors, whose sum is σ = 989484974. Its totient is φ = 989484972.

The previous prime is 989484943. The next prime is 989484989. The reversal of 989484973 is 379484989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 982070244 + 7414729 = 31338^2 + 2723^2 .

It is a cyclic number.

It is not a de Polignac number, because 989484973 - 2²⁵ = 955930541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989484913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494742486 + 494742487.

It is an arithmetic number, because the mean of its divisors is an integer number (494742487).

Almost surely, 2^989484973 is an apocalyptic number.

It is an amenable number.

989484973 is a deficient number, since it is larger than the sum of its proper divisors (1).

989484973 is an equidigital number, since it uses as much as digits as its factorization.

989484973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 61.

The square root of 989484973 is about 31456.0800641148. The cubic root of 989484973 is about 996.4826336393.

The spelling of 989484973 in words is "nine hundred eighty-nine million, four hundred eighty-four thousand, nine hundred seventy-three".