1897894 has 4 divisors (see below), whose sum is σ = 2846844. Its totient is φ = 948946.

The previous prime is 1897871. The next prime is 1897939. The reversal of 1897894 is 4987981.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474472 + ... + 474475.

It is an arithmetic number, because the mean of its divisors is an integer number (711711).

2^1897894 is an apocalyptic number.

1897894 is a deficient number, since it is larger than the sum of its proper divisors (948950).

1897894 is an equidigital number, since it uses as much as digits as its factorization.

1897894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948949.

The product of its digits is 145152, while the sum is 46.

The square root of 1897894 is about 1377.6407369122. The cubic root of 1897894 is about 123.8104544262.

The spelling of 1897894 in words is "one million, eight hundred ninety-seven thousand, eight hundred ninety-four".