2091669 has 8 divisors (see below), whose sum is σ = 2827392. Its totient is φ = 1375200.

The previous prime is 2091667. The next prime is 2091671. The reversal of 2091669 is 9661902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2091667) and next prime (2091671).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2091669 - 2¹ = 2091667 is a prime.

It is a super-2 number, since 2×2091669² = 8750158411122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4557 + ... + 4994.

It is an arithmetic number, because the mean of its divisors is an integer number (353424).

2^2091669 is an apocalyptic number.

It is an amenable number.

2091669 is a deficient number, since it is larger than the sum of its proper divisors (735723).

2091669 is an equidigital number, since it uses as much as digits as its factorization.

2091669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9627.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 2091669 is about 1446.2603500062. The cubic root of 2091669 is about 127.8883507205. Note that the first 3 decimals are identical.

The spelling of 2091669 in words is "two million, ninety-one thousand, six hundred sixty-nine".