1897197 has 8 divisors (see below), whose sum is σ = 2564544. Its totient is φ = 1247328.

The previous prime is 1897177. The next prime is 1897199. The reversal of 1897197 is 7917981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1897197 - 2⁷ = 1897069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4113 + ... + 4550.

It is an arithmetic number, because the mean of its divisors is an integer number (320568).

2^1897197 is an apocalyptic number.

It is an amenable number.

1897197 is a deficient number, since it is larger than the sum of its proper divisors (667347).

1897197 is an equidigital number, since it uses as much as digits as its factorization.

1897197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8739.

The product of its digits is 31752, while the sum is 42.

The square root of 1897197 is about 1377.3877449723. The cubic root of 1897197 is about 123.7952961414.

The spelling of 1897197 in words is "one million, eight hundred ninety-seven thousand, one hundred ninety-seven".