1797397 has 4 divisors (see below), whose sum is σ = 2054176. Its totient is φ = 1540620.

The previous prime is 1797379. The next prime is 1797407. The reversal of 1797397 is 7937971.

It is a happy number.

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: 7937971 = 47 ⋅168893.

It is a cyclic number.

It is not a de Polignac number, because 1797397 - 2¹⁹ = 1273109 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 (1797307) 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, 128379 + ... + 128392.

It is an arithmetic number, because the mean of its divisors is an integer number (513544).

2^1797397 is an apocalyptic number.

It is an amenable number.

1797397 is a deficient number, since it is larger than the sum of its proper divisors (256779).

1797397 is an equidigital number, since it uses as much as digits as its factorization.

1797397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256778.

The product of its digits is 83349, while the sum is 43.

The square root of 1797397 is about 1340.6703547107. The cubic root of 1797397 is about 121.5853746910.

The spelling of 1797397 in words is "one million, seven hundred ninety-seven thousand, three hundred ninety-seven".