1997959373 has 2 divisors, whose sum is σ = 1997959374. Its totient is φ = 1997959372.

The previous prime is 1997959367. The next prime is 1997959399. The reversal of 1997959373 is 3739597991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1702222564 + 295736809 = 41258^2 + 17197^2 .

It is a cyclic number.

It is not a de Polignac number, because 1997959373 - 2³⁰ = 924217549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1997959333) 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, 998979686 + 998979687.

It is an arithmetic number, because the mean of its divisors is an integer number (998979687).

Almost surely, 2^1997959373 is an apocalyptic number.

It is an amenable number.

1997959373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997959373 is an equidigital number, since it uses as much as digits as its factorization.

1997959373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14467005, while the sum is 62.

The square root of 1997959373 is about 44698.5388239929. The cubic root of 1997959373 is about 1259.4923992571.

The spelling of 1997959373 in words is "one billion, nine hundred ninety-seven million, nine hundred fifty-nine thousand, three hundred seventy-three".