989040973 has 2 divisors, whose sum is σ = 989040974. Its totient is φ = 989040972.

The previous prime is 989040959. The next prime is 989040989. The reversal of 989040973 is 379040989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 895086724 + 93954249 = 29918^2 + 9693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989040973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989040373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494520486 + 494520487.

It is an arithmetic number, because the mean of its divisors is an integer number (494520487).

Almost surely, 2^989040973 is an apocalyptic number.

It is an amenable number.

989040973 is a deficient number, since it is larger than the sum of its proper divisors (1).

989040973 is an equidigital number, since it uses as much as digits as its factorization.

989040973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 989040973 is about 31449.0218130867. The cubic root of 989040973 is about 996.3335646810. Note that the first 3 decimals are identical.

The spelling of 989040973 in words is "nine hundred eighty-nine million, forty thousand, nine hundred seventy-three".