3193661 has 4 divisors (see below), whose sum is σ = 3197532. Its totient is φ = 3189792.

The previous prime is 3193643. The next prime is 3193667. The reversal of 3193661 is 1663913.

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 649636 + 2544025 = 806^2 + 1595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3193661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3193667) 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, 146 + ... + 2531.

It is an arithmetic number, because the mean of its divisors is an integer number (799383).

Almost surely, 2^3193661 is an apocalyptic number.

It is an amenable number.

3193661 is a deficient number, since it is larger than the sum of its proper divisors (3871).

3193661 is a wasteful number, since it uses less digits than its factorization.

3193661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870.

The product of its digits is 2916, while the sum is 29.

The square root of 3193661 is about 1787.0816993076. The cubic root of 3193661 is about 147.2638911415.

The spelling of 3193661 in words is "three million, one hundred ninety-three thousand, six hundred sixty-one".