3656893 has 4 divisors (see below), whose sum is σ = 3661020. Its totient is φ = 3652768.

The previous prime is 3656881. The next prime is 3656903. The reversal of 3656893 is 3986563.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1352569 + 2304324 = 1163^2 + 1518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3656893 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130 + ... + 2707.

It is an arithmetic number, because the mean of its divisors is an integer number (915255).

Almost surely, 2^3656893 is an apocalyptic number.

It is an amenable number.

3656893 is a deficient number, since it is larger than the sum of its proper divisors (4127).

3656893 is a wasteful number, since it uses less digits than its factorization.

3656893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126.

The product of its digits is 116640, while the sum is 40.

The square root of 3656893 is about 1912.3004471055. The cubic root of 3656893 is about 154.0650340941.

The spelling of 3656893 in words is "three million, six hundred fifty-six thousand, eight hundred ninety-three".