3643975 has 6 divisors (see below), whose sum is σ = 4518560. Its totient is φ = 2915160.

The previous prime is 3643973. The next prime is 3644021. The reversal of 3643975 is 5793463.

It is not a de Polignac number, because 3643975 - 2¹ = 3643973 is a prime.

It is a d-powerful number, because it can be written as 3⁷ + 6⁸ + 4 + 3⁸ + 9² + 7⁴ + 5⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643973) 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 5 ways as a sum of consecutive naturals, for example, 72855 + ... + 72904.

Almost surely, 2^3643975 is an apocalyptic number.

3643975 is a deficient number, since it is larger than the sum of its proper divisors (874585).

3643975 is a wasteful number, since it uses less digits than its factorization.

3643975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145769 (or 145764 counting only the distinct ones).

The product of its digits is 68040, while the sum is 37.

The square root of 3643975 is about 1908.9198516439. The cubic root of 3643975 is about 153.8834081255.

The spelling of 3643975 in words is "three million, six hundred forty-three thousand, nine hundred seventy-five".