3656973 has 4 divisors (see below), whose sum is σ = 4875968. Its totient is φ = 2437980.

The previous prime is 3656953. The next prime is 3656981. The reversal of 3656973 is 3796563.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3796563 = 3 ⋅1265521.

It is not a de Polignac number, because 3656973 - 2⁶ = 3656909 is a prime.

It is an Ulam number.

It is a D-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 (3656903) 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 3 ways as a sum of consecutive naturals, for example, 609493 + ... + 609498.

It is an arithmetic number, because the mean of its divisors is an integer number (1218992).

Almost surely, 2^3656973 is an apocalyptic number.

It is an amenable number.

3656973 is a deficient number, since it is larger than the sum of its proper divisors (1218995).

3656973 is a wasteful number, since it uses less digits than its factorization.

3656973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218994.

The product of its digits is 102060, while the sum is 39.

The square root of 3656973 is about 1912.3213642063. The cubic root of 3656973 is about 154.0661575535.

The spelling of 3656973 in words is "three million, six hundred fifty-six thousand, nine hundred seventy-three".