689939189371 has 2 divisors, whose sum is σ = 689939189372. Its totient is φ = 689939189370.

The previous prime is 689939189327. The next prime is 689939189393. The reversal of 689939189371 is 173981939986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689939189371 - 2¹⁵ = 689939156603 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 689939189294 and 689939189303.

It is not a weakly prime, because it can be changed into another prime (689939189671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344969594685 + 344969594686.

It is an arithmetic number, because the mean of its divisors is an integer number (344969594686).

Almost surely, 2^689939189371 is an apocalyptic number.

689939189371 is a deficient number, since it is larger than the sum of its proper divisors (1).

689939189371 is an equidigital number, since it uses as much as digits as its factorization.

689939189371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158723712, while the sum is 73.

The spelling of 689939189371 in words is "six hundred eighty-nine billion, nine hundred thirty-nine million, one hundred eighty-nine thousand, three hundred seventy-one".