3291961 has 4 divisors (see below), whose sum is σ = 3302992. Its totient is φ = 3280932.

The previous prime is 3291949. The next prime is 3291979. The reversal of 3291961 is 1691923.

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: 1691923 = 653 ⋅2591.

It is a cyclic number.

It is not a de Polignac number, because 3291961 - 2⁵ = 3291929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3291901) 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, 5055 + ... + 5668.

It is an arithmetic number, because the mean of its divisors is an integer number (825748).

Almost surely, 2^3291961 is an apocalyptic number.

It is an amenable number.

3291961 is a deficient number, since it is larger than the sum of its proper divisors (11031).

3291961 is a wasteful number, since it uses less digits than its factorization.

3291961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11030.

The product of its digits is 2916, while the sum is 31.

The square root of 3291961 is about 1814.3762013430. The cubic root of 3291961 is about 148.7595629753.

The spelling of 3291961 in words is "three million, two hundred ninety-one thousand, nine hundred sixty-one".