1689967919 has 2 divisors, whose sum is σ = 1689967920. Its totient is φ = 1689967918.

The previous prime is 1689967891. The next prime is 1689967927. The reversal of 1689967919 is 9197699861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1689967919 - 2¹² = 1689963823 is a prime.

It is a super-2 number, since 2×1689967919² = 5711983134498381122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1689967949) 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, 844983959 + 844983960.

It is an arithmetic number, because the mean of its divisors is an integer number (844983960).

Almost surely, 2^1689967919 is an apocalyptic number.

1689967919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689967919 is an equidigital number, since it uses as much as digits as its factorization.

1689967919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13226976, while the sum is 65.

The square root of 1689967919 is about 41109.2193917617. The cubic root of 1689967919 is about 1191.1308880853.

The spelling of 1689967919 in words is "one billion, six hundred eighty-nine million, nine hundred sixty-seven thousand, nine hundred nineteen".