1669053697 has 4 divisors (see below), whose sum is σ = 1674750420. Its totient is φ = 1663356976.

The previous prime is 1669053679. The next prime is 1669053739. The reversal of 1669053697 is 7963509661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 756470016 + 912583681 = 27504^2 + 30209^2 .

It is a cyclic number.

It is not a de Polignac number, because 1669053697 - 2⁷ = 1669053569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1669053637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2847922 + ... + 2848507.

It is an arithmetic number, because the mean of its divisors is an integer number (418687605).

Almost surely, 2^1669053697 is an apocalyptic number.

It is an amenable number.

1669053697 is a deficient number, since it is larger than the sum of its proper divisors (5696723).

1669053697 is an equidigital number, since it uses as much as digits as its factorization.

1669053697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5696722.

The product of its (nonzero) digits is 1837080, while the sum is 52.

The square root of 1669053697 is about 40854.0536177256. The cubic root of 1669053697 is about 1186.1968589672.

The spelling of 1669053697 in words is "one billion, six hundred sixty-nine million, fifty-three thousand, six hundred ninety-seven".