3651669 has 24 divisors (see below), whose sum is σ = 6227520. Its totient is φ = 2071656.

The previous prime is 3651653. The next prime is 3651671. The reversal of 3651669 is 9661563.

It is not a de Polignac number, because 3651669 - 2⁴ = 3651653 is a prime.

It is a super-2 number, since 2×3651669² = 26669372971122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26202 + ... + 26340.

It is an arithmetic number, because the mean of its divisors is an integer number (259480).

Almost surely, 2^3651669 is an apocalyptic number.

It is an amenable number.

3651669 is a deficient number, since it is larger than the sum of its proper divisors (2575851).

3651669 is an equidigital number, since it uses as much as digits as its factorization.

3651669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 149 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 3651669 is about 1910.9340647966. The cubic root of 3651669 is about 153.9916366965.

It can be divided in two parts, 36516 and 69, that added together give a triangular number (36585 = T₂₇₀).

The spelling of 3651669 in words is "three million, six hundred fifty-one thousand, six hundred sixty-nine".