1669754969 has 2 divisors, whose sum is σ = 1669754970. Its totient is φ = 1669754968.

The previous prime is 1669754923. The next prime is 1669755001. The reversal of 1669754969 is 9694579661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1614994969 + 54760000 = 40187^2 + 7400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1669754969 - 2²⁰ = 1668706393 is a prime.

It is a super-2 number, since 2×1669754969² = 5576163313000381922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1669754869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834877484 + 834877485.

It is an arithmetic number, because the mean of its divisors is an integer number (834877485).

Almost surely, 2^1669754969 is an apocalyptic number.

It is an amenable number.

1669754969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669754969 is an equidigital number, since it uses as much as digits as its factorization.

1669754969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22044960, while the sum is 62.

The square root of 1669754969 is about 40862.6353653310. The cubic root of 1669754969 is about 1186.3629670977.

The spelling of 1669754969 in words is "one billion, six hundred sixty-nine million, seven hundred fifty-four thousand, nine hundred sixty-nine".