1889968477 has 2 divisors, whose sum is σ = 1889968478. Its totient is φ = 1889968476.

The previous prime is 1889968453. The next prime is 1889968501. The reversal of 1889968477 is 7748699881.

It is a balanced prime because it is at equal distance from previous prime (1889968453) and next prime (1889968501).

It can be written as a sum of positive squares in only one way, i.e., 1217032996 + 672935481 = 34886^2 + 25941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1889968477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1889968447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944984238 + 944984239.

It is an arithmetic number, because the mean of its divisors is an integer number (944984239).

Almost surely, 2^1889968477 is an apocalyptic number.

It is an amenable number.

1889968477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889968477 is an equidigital number, since it uses as much as digits as its factorization.

1889968477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 67.

The square root of 1889968477 is about 43473.7676881128. The cubic root of 1889968477 is about 1236.3787160802.

The spelling of 1889968477 in words is "one billion, eight hundred eighty-nine million, nine hundred sixty-eight thousand, four hundred seventy-seven".