1690069 has 4 divisors (see below), whose sum is σ = 1779040. Its totient is φ = 1601100.

The previous prime is 1690067. The next prime is 1690079. The reversal of 1690069 is 9600961.

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: 9600961 = 983 ⋅9767.

It is a cyclic number.

It is not a de Polignac number, because 1690069 - 2¹ = 1690067 is a prime.

It is a super-2 number, since 2×1690069² = 5712666449522, which contains 22 as substring.

It is a Duffinian number.

1690069 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1690069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690067) 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, 44457 + ... + 44494.

It is an arithmetic number, because the mean of its divisors is an integer number (444760).

2^1690069 is an apocalyptic number.

1690069 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1690069 is a deficient number, since it is larger than the sum of its proper divisors (88971).

1690069 is an equidigital number, since it uses as much as digits as its factorization.

1690069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88970.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 1690069 is about 1300.0265381907. The cubic root of 1690069 is about 119.1154635735.

The spelling of 1690069 in words is "one million, six hundred ninety thousand, sixty-nine".