1889491 has 2 divisors, whose sum is σ = 1889492. Its totient is φ = 1889490.

The previous prime is 1889483. The next prime is 1889497. The reversal of 1889491 is 1949881.

It is a strong prime.

It is an emirp because it is prime and its reverse (1949881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1889491 - 2³ = 1889483 is a prime.

It is not a weakly prime, because it can be changed into another prime (1889497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944745 + 944746.

It is an arithmetic number, because the mean of its divisors is an integer number (944746).

2^1889491 is an apocalyptic number.

1889491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889491 is an equidigital number, since it uses as much as digits as its factorization.

1889491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 40.

The square root of 1889491 is about 1374.5875745110. The cubic root of 1889491 is about 123.6274588749.

The spelling of 1889491 in words is "one million, eight hundred eighty-nine thousand, four hundred ninety-one".