1689952356427 has 2 divisors, whose sum is σ = 1689952356428. Its totient is φ = 1689952356426.

The previous prime is 1689952356419. The next prime is 1689952356457. The reversal of 1689952356427 is 7246532599861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1689952356427 - 2³ = 1689952356419 is a prime.

It is not a weakly prime, because it can be changed into another prime (1689952356457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844976178213 + 844976178214.

It is an arithmetic number, because the mean of its divisors is an integer number (844976178214).

Almost surely, 2^{1689952356427} is an apocalyptic number.

1689952356427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689952356427 is an equidigital number, since it uses as much as digits as its factorization.

1689952356427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 195955200, while the sum is 67.

The spelling of 1689952356427 in words is "one trillion, six hundred eighty-nine billion, nine hundred fifty-two million, three hundred fifty-six thousand, four hundred twenty-seven".