1676778889 has 2 divisors, whose sum is σ = 1676778890. Its totient is φ = 1676778888.

The previous prime is 1676778847. The next prime is 1676778907. The reversal of 1676778889 is 9888776761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1469418889 + 207360000 = 38333^2 + 14400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1676778889 - 2¹⁵ = 1676746121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1676778589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 838389444 + 838389445.

It is an arithmetic number, because the mean of its divisors is an integer number (838389445).

Almost surely, 2^1676778889 is an apocalyptic number.

It is an amenable number.

1676778889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1676778889 is an equidigital number, since it uses as much as digits as its factorization.

1676778889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56899584, while the sum is 67.

The square root of 1676778889 is about 40948.4906803657. The cubic root of 1676778889 is about 1188.0241412731.

The spelling of 1676778889 in words is "one billion, six hundred seventy-six million, seven hundred seventy-eight thousand, eight hundred eighty-nine".