1997008973 has 2 divisors, whose sum is σ = 1997008974. Its totient is φ = 1997008972.

The previous prime is 1997008963. The next prime is 1997009009. The reversal of 1997008973 is 3798007991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1985326249 + 11682724 = 44557^2 + 3418^2 .

It is a cyclic number.

It is not a de Polignac number, because 1997008973 - 2⁴ = 1997008957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1997008913) 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, 998504486 + 998504487.

It is an arithmetic number, because the mean of its divisors is an integer number (998504487).

Almost surely, 2^1997008973 is an apocalyptic number.

It is an amenable number.

1997008973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997008973 is an equidigital number, since it uses as much as digits as its factorization.

1997008973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 857304, while the sum is 53.

The square root of 1997008973 is about 44687.9063394113. The cubic root of 1997008973 is about 1259.2926602226.

The spelling of 1997008973 in words is "one billion, nine hundred ninety-seven million, eight thousand, nine hundred seventy-three".