1669123441 has 4 divisors (see below), whose sum is σ = 1670284800. Its totient is φ = 1667962084.

The previous prime is 1669123433. The next prime is 1669123447. The reversal of 1669123441 is 1443219661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1443219661 = 13 ⋅111016897.

It is a cyclic number.

It is not a de Polignac number, because 1669123441 - 2³ = 1669123433 is a prime.

It is a super-2 number, since 2×1669123441² = 5571946122591360962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1669123441.

It is not an unprimeable number, because it can be changed into a prime (1669123447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578521 + ... + 581398.

It is an arithmetic number, because the mean of its divisors is an integer number (417571200).

Almost surely, 2^1669123441 is an apocalyptic number.

It is an amenable number.

1669123441 is a deficient number, since it is larger than the sum of its proper divisors (1161359).

1669123441 is a wasteful number, since it uses less digits than its factorization.

1669123441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161358.

The product of its digits is 31104, while the sum is 37.

The square root of 1669123441 is about 40854.9071838378. The cubic root of 1669123441 is about 1186.2133810962.

The spelling of 1669123441 in words is "one billion, six hundred sixty-nine million, one hundred twenty-three thousand, four hundred forty-one".