1997349 has 4 divisors (see below), whose sum is σ = 2663136. Its totient is φ = 1331564.

The previous prime is 1997341. The next prime is 1997351. The reversal of 1997349 is 9437991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9437991 = 3 ⋅3145997.

It is a cyclic number.

It is not a de Polignac number, because 1997349 - 2³ = 1997341 is a prime.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1997349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997341) 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, 332889 + ... + 332894.

It is an arithmetic number, because the mean of its divisors is an integer number (665784).

2^1997349 is an apocalyptic number.

It is an amenable number.

1997349 is a deficient number, since it is larger than the sum of its proper divisors (665787).

1997349 is an equidigital number, since it uses as much as digits as its factorization.

1997349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665786.

The product of its digits is 61236, while the sum is 42.

The square root of 1997349 is about 1413.2759815408. The cubic root of 1997349 is about 125.9364128639.

It can be divided in two parts, 1997 and 349, that added together give a triangular number (2346 = T₆₈).

The spelling of 1997349 in words is "one million, nine hundred ninety-seven thousand, three hundred forty-nine".