1789142669 has 2 divisors, whose sum is σ = 1789142670. Its totient is φ = 1789142668.

The previous prime is 1789142629. The next prime is 1789142671. The reversal of 1789142669 is 9662419871.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1767193444 + 21949225 = 42038^2 + 4685^2 .

It is a cyclic number.

It is not a de Polignac number, because 1789142669 - 2⁸ = 1789142413 is a prime.

It is a super-2 number, since 2×1789142669² = 6402062980072887122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1789142671, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1789142669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1789142629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 894571334 + 894571335.

It is an arithmetic number, because the mean of its divisors is an integer number (894571335).

Almost surely, 2^1789142669 is an apocalyptic number.

It is an amenable number.

1789142669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1789142669 is an equidigital number, since it uses as much as digits as its factorization.

1789142669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 1789142669 is about 42298.2584629675. The cubic root of 1789142669 is about 1213.9896694457.

The spelling of 1789142669 in words is "one billion, seven hundred eighty-nine million, one hundred forty-two thousand, six hundred sixty-nine".