1689206423 has 2 divisors, whose sum is σ = 1689206424. Its totient is φ = 1689206422.

The previous prime is 1689206371. The next prime is 1689206443. The reversal of 1689206423 is 3246029861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1689206423 - 2³⁰ = 615464599 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1689206443) 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, 844603211 + 844603212.

It is an arithmetic number, because the mean of its divisors is an integer number (844603212).

Almost surely, 2^1689206423 is an apocalyptic number.

1689206423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689206423 is an equidigital number, since it uses as much as digits as its factorization.

1689206423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 1689206423 is about 41099.9564841619. The cubic root of 1689206423 is about 1190.9519541801.

The spelling of 1689206423 in words is "one billion, six hundred eighty-nine million, two hundred six thousand, four hundred twenty-three".