1889617 has 2 divisors, whose sum is σ = 1889618. Its totient is φ = 1889616.

The previous prime is 1889603. The next prime is 1889621. The reversal of 1889617 is 7169881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1347921 + 541696 = 1161^2 + 736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1889617 - 2¹¹ = 1887569 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1889617.

It is not a weakly prime, because it can be changed into another prime (1889647) 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, 944808 + 944809.

It is an arithmetic number, because the mean of its divisors is an integer number (944809).

2^1889617 is an apocalyptic number.

It is an amenable number.

1889617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889617 is an equidigital number, since it uses as much as digits as its factorization.

1889617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 40.

The square root of 1889617 is about 1374.6334056759. The cubic root of 1889617 is about 123.6302068307.

The spelling of 1889617 in words is "one million, eight hundred eighty-nine thousand, six hundred seventeen".