1997353 has 4 divisors (see below), whose sum is σ = 2024788. Its totient is φ = 1969920.

The previous prime is 1997351. The next prime is 1997407. The reversal of 1997353 is 3537991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1172889 + 824464 = 1083^2 + 908^2 .

It is a cyclic number.

It is not a de Polignac number, because 1997353 - 2¹ = 1997351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13608 + ... + 13753.

It is an arithmetic number, because the mean of its divisors is an integer number (506197).

2^1997353 is an apocalyptic number.

It is an amenable number.

1997353 is a deficient number, since it is larger than the sum of its proper divisors (27435).

1997353 is an equidigital number, since it uses as much as digits as its factorization.

1997353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27434.

The product of its digits is 25515, while the sum is 37.

The square root of 1997353 is about 1413.2773966918. The cubic root of 1997353 is about 125.9364969329.

The spelling of 1997353 in words is "one million, nine hundred ninety-seven thousand, three hundred fifty-three".