1001669 has 2 divisors, whose sum is σ = 1001670. Its totient is φ = 1001668.

The previous prime is 1001659. The next prime is 1001683. The reversal of 1001669 is 9661001.

1001669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 833569 + 168100 = 913^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001669 - 2¹² = 997573 is a prime.

It is a super-2 number, since 2×1001669² = 2006681571122, which contains 22 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500834 + 500835.

It is an arithmetic number, because the mean of its divisors is an integer number (500835).

2^1001669 is an apocalyptic number.

It is an amenable number.

1001669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001669 is an equidigital number, since it uses as much as digits as its factorization.

1001669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1001669 is about 1000.8341520951. The cubic root of 1001669 is about 100.0556024113.

The spelling of 1001669 in words is "one million, one thousand, six hundred sixty-nine".