4003669 has 2 divisors, whose sum is σ = 4003670. Its totient is φ = 4003668.

The previous prime is 4003667. The next prime is 4003697. The reversal of 4003669 is 9663004.

It is an a-pointer prime, because the next prime (4003697) can be obtained adding 4003669 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3470769 + 532900 = 1863^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 4003669 - 2¹ = 4003667 is a prime.

It is a super-2 number, since 2×4003669² = 32058730923122, which contains 22 as substring.

Together with 4003667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4003663) 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 as a sum of consecutive naturals, namely, 2001834 + 2001835.

It is an arithmetic number, because the mean of its divisors is an integer number (2001835).

Almost surely, 2^4003669 is an apocalyptic number.

It is an amenable number.

4003669 is a deficient number, since it is larger than the sum of its proper divisors (1).

4003669 is an equidigital number, since it uses as much as digits as its factorization.

4003669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 4003669 is about 2000.9170397595. The cubic root of 4003669 is about 158.7886251520.

The spelling of 4003669 in words is "four million, three thousand, six hundred sixty-nine".