3656761 has 4 divisors (see below), whose sum is σ = 3718800. Its totient is φ = 3594724.

The previous prime is 3656753. The next prime is 3656773. The reversal of 3656761 is 1676563.

It is a happy number.

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: 1676563 = 7 ⋅239509.

It is a cyclic number.

It is not a de Polignac number, because 3656761 - 2³ = 3656753 is a prime.

It is a super-2 number, since 2×3656761² = 26743802022242, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3656561) 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, 30931 + ... + 31048.

It is an arithmetic number, because the mean of its divisors is an integer number (929700).

Almost surely, 2^3656761 is an apocalyptic number.

It is an amenable number.

3656761 is a deficient number, since it is larger than the sum of its proper divisors (62039).

3656761 is an equidigital number, since it uses as much as digits as its factorization.

3656761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62038.

The product of its digits is 22680, while the sum is 34.

The square root of 3656761 is about 1912.2659333890. The cubic root of 3656761 is about 154.0631803502.

The spelling of 3656761 in words is "three million, six hundred fifty-six thousand, seven hundred sixty-one".