3653997 has 8 divisors (see below), whose sum is σ = 5158656. Its totient is φ = 2292672.

The previous prime is 3653989. The next prime is 3653999. The reversal of 3653997 is 7993563.

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

It is not a de Polignac number, because 3653997 - 2³ = 3653989 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3653999) 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 7 ways as a sum of consecutive naturals, for example, 35773 + ... + 35874.

It is an arithmetic number, because the mean of its divisors is an integer number (644832).

Almost surely, 2^3653997 is an apocalyptic number.

It is an amenable number.

3653997 is a deficient number, since it is larger than the sum of its proper divisors (1504659).

3653997 is a wasteful number, since it uses less digits than its factorization.

3653997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71667.

The product of its digits is 153090, while the sum is 42.

The square root of 3653997 is about 1911.5430939427. The cubic root of 3653997 is about 154.0243538254.

The spelling of 3653997 in words is "three million, six hundred fifty-three thousand, nine hundred ninety-seven".