1997293 has 2 divisors, whose sum is σ = 1997294. Its totient is φ = 1997292.

The previous prime is 1997269. The next prime is 1997311. The reversal of 1997293 is 3927991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1261129 + 736164 = 1123^2 + 858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1997293 - 2⁹ = 1996781 is a prime.

1997293 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1997213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998646 + 998647.

It is an arithmetic number, because the mean of its divisors is an integer number (998647).

2^1997293 is an apocalyptic number.

It is an amenable number.

1997293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997293 is an equidigital number, since it uses as much as digits as its factorization.

1997293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 40.

The square root of 1997293 is about 1413.2561692772. The cubic root of 1997293 is about 125.9352358863.

The spelling of 1997293 in words is "one million, nine hundred ninety-seven thousand, two hundred ninety-three".