1669331 has 2 divisors, whose sum is σ = 1669332. Its totient is φ = 1669330.

The previous prime is 1669313. The next prime is 1669351. The reversal of 1669331 is 1339661.

Together with previous prime (1669313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1339661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1669331 - 2¹⁰ = 1668307 is a prime.

It is a super-2 number, since 2×1669331² = 5573331975122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1669294 and 1669303.

It is not a weakly prime, because it can be changed into another prime (1669301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834665 + 834666.

It is an arithmetic number, because the mean of its divisors is an integer number (834666).

2^1669331 is an apocalyptic number.

1669331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669331 is an equidigital number, since it uses as much as digits as its factorization.

1669331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 29.

The square root of 1669331 is about 1292.0259285324. The cubic root of 1669331 is about 118.6262548432.

The spelling of 1669331 in words is "one million, six hundred sixty-nine thousand, three hundred thirty-one".