1669748243 has 2 divisors, whose sum is σ = 1669748244. Its totient is φ = 1669748242.

The previous prime is 1669748209. The next prime is 1669748287. The reversal of 1669748243 is 3428479661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1669748243 - 2¹⁴ = 1669731859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1669748191 and 1669748200.

It is not a weakly prime, because it can be changed into another prime (1669747243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834874121 + 834874122.

It is an arithmetic number, because the mean of its divisors is an integer number (834874122).

Almost surely, 2^1669748243 is an apocalyptic number.

1669748243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669748243 is an equidigital number, since it uses as much as digits as its factorization.

1669748243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 50.

The square root of 1669748243 is about 40862.5530651231. The cubic root of 1669748243 is about 1186.3613741517.

The spelling of 1669748243 in words is "one billion, six hundred sixty-nine million, seven hundred forty-eight thousand, two hundred forty-three".