1973897 has 2 divisors, whose sum is σ = 1973898. Its totient is φ = 1973896.

The previous prime is 1973893. The next prime is 1973903. The reversal of 1973897 is 7983791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1073296 + 900601 = 1036^2 + 949^2 .

It is a cyclic number.

It is not a de Polignac number, because 1973897 - 2² = 1973893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986948 + 986949.

It is an arithmetic number, because the mean of its divisors is an integer number (986949).

2^1973897 is an apocalyptic number.

It is an amenable number.

1973897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973897 is an equidigital number, since it uses as much as digits as its factorization.

1973897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 44.

The square root of 1973897 is about 1404.9544476601. The cubic root of 1973897 is about 125.4415742605.

The spelling of 1973897 in words is "one million, nine hundred seventy-three thousand, eight hundred ninety-seven".