1889969 has 2 divisors, whose sum is σ = 1889970. Its totient is φ = 1889968.

The previous prime is 1889957. The next prime is 1889981. The reversal of 1889969 is 9699881.

It is a balanced prime because it is at equal distance from previous prime (1889957) and next prime (1889981).

It can be written as a sum of positive squares in only one way, i.e., 1787569 + 102400 = 1337^2 + 320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1889969 is a prime.

It is a super-2 number, since 2×1889969² = 7143965641922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1889999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944984 + 944985.

It is an arithmetic number, because the mean of its divisors is an integer number (944985).

2^1889969 is an apocalyptic number.

It is an amenable number.

1889969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889969 is an equidigital number, since it uses as much as digits as its factorization.

1889969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 50.

The square root of 1889969 is about 1374.7614338495. The cubic root of 1889969 is about 123.6378830125.

It can be divided in two parts, 18899 and 69, that multiplied together give a palindrome (1304031).

The spelling of 1889969 in words is "one million, eight hundred eighty-nine thousand, nine hundred sixty-nine".