3197661 has 4 divisors (see below), whose sum is σ = 4263552. Its totient is φ = 2131772.

The previous prime is 3197659. The next prime is 3197669. The reversal of 3197661 is 1667913.

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.

It is a cyclic number.

It is not a de Polignac number, because 3197661 - 2¹ = 3197659 is a prime.

It is a D-number.

3197661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3197669) 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, 532941 + ... + 532946.

It is an arithmetic number, because the mean of its divisors is an integer number (1065888).

Almost surely, 2^3197661 is an apocalyptic number.

It is an amenable number.

3197661 is a deficient number, since it is larger than the sum of its proper divisors (1065891).

3197661 is a wasteful number, since it uses less digits than its factorization.

3197661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065890.

The product of its digits is 6804, while the sum is 33.

The square root of 3197661 is about 1788.2004921149. The cubic root of 3197661 is about 147.3253472372.

The spelling of 3197661 in words is "three million, one hundred ninety-seven thousand, six hundred sixty-one".