1889143 has 2 divisors, whose sum is σ = 1889144. Its totient is φ = 1889142.

The previous prime is 1889131. The next prime is 1889177. The reversal of 1889143 is 3419881.

It is a happy number.

It is an a-pointer prime, because the next prime (1889177) can be obtained adding 1889143 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1889143 - 2¹³ = 1880951 is a prime.

It is a super-2 number, since 2×1889143² = 7137722548898, which contains 22 as substring.

1889143 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1889099 and 1889108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1889743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944571 + 944572.

It is an arithmetic number, because the mean of its divisors is an integer number (944572).

2^1889143 is an apocalyptic number.

1889143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889143 is an equidigital number, since it uses as much as digits as its factorization.

1889143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 34.

The square root of 1889143 is about 1374.4609852593. The cubic root of 1889143 is about 123.6198686478.

The spelling of 1889143 in words is "one million, eight hundred eighty-nine thousand, one hundred forty-three".