3664961 has 4 divisors (see below), whose sum is σ = 3764052. Its totient is φ = 3565872.

The previous prime is 3664957. The next prime is 3664963. The reversal of 3664961 is 1694663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1694663 = 23 ⋅73681.

It can be written as a sum of positive squares in 2 ways, for example, as 1308736 + 2356225 = 1144^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 3664961 - 2² = 3664957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3664963) 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, 49490 + ... + 49563.

It is an arithmetic number, because the mean of its divisors is an integer number (941013).

Almost surely, 2^3664961 is an apocalyptic number.

It is an amenable number.

3664961 is a deficient number, since it is larger than the sum of its proper divisors (99091).

3664961 is an equidigital number, since it uses as much as digits as its factorization.

3664961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99090.

The product of its digits is 23328, while the sum is 35.

The square root of 3664961 is about 1914.4087860225. The cubic root of 3664961 is about 154.1782525827.

The spelling of 3664961 in words is "three million, six hundred sixty-four thousand, nine hundred sixty-one".