1954889 has 2 divisors, whose sum is σ = 1954890. Its totient is φ = 1954888.

The previous prime is 1954877. The next prime is 1954907. The reversal of 1954889 is 9884591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 466489 = 1220^2 + 683^2 .

It is a cyclic number.

It is not a de Polignac number, because 1954889 - 2⁴ = 1954873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1954819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977444 + 977445.

It is an arithmetic number, because the mean of its divisors is an integer number (977445).

2^1954889 is an apocalyptic number.

It is an amenable number.

1954889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954889 is an equidigital number, since it uses as much as digits as its factorization.

1954889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 44.

The square root of 1954889 is about 1398.1734513286. The cubic root of 1954889 is about 125.0376206763.

The spelling of 1954889 in words is "one million, nine hundred fifty-four thousand, eight hundred eighty-nine".