1669069 has 4 divisors (see below), whose sum is σ = 1709820. Its totient is φ = 1628320.

The previous prime is 1669061. The next prime is 1669091. The reversal of 1669069 is 9609661.

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 260100 + 1408969 = 510^2 + 1187^2 .

It is a cyclic number.

It is not a de Polignac number, because 1669069 - 2³ = 1669061 is a prime.

It is a super-2 number, since 2×1669069² = 5571582653522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669061) 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, 20314 + ... + 20395.

It is an arithmetic number, because the mean of its divisors is an integer number (427455).

2^1669069 is an apocalyptic number.

It is an amenable number.

1669069 is a deficient number, since it is larger than the sum of its proper divisors (40751).

1669069 is an equidigital number, since it uses as much as digits as its factorization.

1669069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40750.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 1669069 is about 1291.9245333997. The cubic root of 1669069 is about 118.6200484238.

The spelling of 1669069 in words is "one million, six hundred sixty-nine thousand, sixty-nine".