1896397 has 4 divisors (see below), whose sum is σ = 1961820. Its totient is φ = 1830976.

The previous prime is 1896353. The next prime is 1896407. The reversal of 1896397 is 7936981.

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 599076 + 1297321 = 774^2 + 1139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1896397 - 2⁷ = 1896269 is a prime.

It is a d-powerful number, because it can be written as 1 + 8 + 9⁶ + 6⁵ + 3⁷ + 9⁶ + 7⁷ .

It is a Duffinian number.

1896397 is a lucky number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1896317) 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, 32668 + ... + 32725.

It is an arithmetic number, because the mean of its divisors is an integer number (490455).

2^1896397 is an apocalyptic number.

It is an amenable number.

1896397 is a deficient number, since it is larger than the sum of its proper divisors (65423).

1896397 is an equidigital number, since it uses as much as digits as its factorization.

1896397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65422.

The product of its digits is 81648, while the sum is 43.

The square root of 1896397 is about 1377.0973095609. The cubic root of 1896397 is about 123.7778932465. Note that the first 3 decimals are identical.

The spelling of 1896397 in words is "one million, eight hundred ninety-six thousand, three hundred ninety-seven".