1889901 has 24 divisors (see below), whose sum is σ = 3046680. Its totient is φ = 1120896.

The previous prime is 1889831. The next prime is 1889957. The reversal of 1889901 is 1099881.

It can be written as a sum of positive squares in 4 ways, for example, as 2025 + 1887876 = 45^2 + 1374^2 .

It is not a de Polignac number, because 1889901 - 2⁹ = 1889389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889981) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 3115 + ... + 3671.

It is an arithmetic number, because the mean of its divisors is an integer number (126945).

2^1889901 is an apocalyptic number.

It is an amenable number.

1889901 is a deficient number, since it is larger than the sum of its proper divisors (1156779).

1889901 is a wasteful number, since it uses less digits than its factorization.

1889901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1889901 is about 1374.7367020633. The cubic root of 1889901 is about 123.6364001881.

The spelling of 1889901 in words is "one million, eight hundred eighty-nine thousand, nine hundred one".