1904897 has 2 divisors, whose sum is σ = 1904898. Its totient is φ = 1904896.

The previous prime is 1904891. The next prime is 1904939. The reversal of 1904897 is 7984091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1540081 + 364816 = 1241^2 + 604^2 .

It is a cyclic number.

It is not a de Polignac number, because 1904897 - 2¹⁰ = 1903873 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1904897.

It is not a weakly prime, because it can be changed into another prime (1904891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952448 + 952449.

It is an arithmetic number, because the mean of its divisors is an integer number (952449).

2^1904897 is an apocalyptic number.

It is an amenable number.

1904897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1904897 is an equidigital number, since it uses as much as digits as its factorization.

1904897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1904897 is about 1380.1800607167. The cubic root of 1904897 is about 123.9625493909.

The spelling of 1904897 in words is "one million, nine hundred four thousand, eight hundred ninety-seven".