3111961 has 4 divisors (see below), whose sum is σ = 3219300. Its totient is φ = 3004624.

The previous prime is 3111931. The next prime is 3111973. The reversal of 3111961 is 1691113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1038361 + 2073600 = 1019^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111961 - 2¹¹ = 3109913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3111931) 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, 53626 + ... + 53683.

It is an arithmetic number, because the mean of its divisors is an integer number (804825).

Almost surely, 2^3111961 is an apocalyptic number.

It is an amenable number.

3111961 is a deficient number, since it is larger than the sum of its proper divisors (107339).

3111961 is a wasteful number, since it uses less digits than its factorization.

3111961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107338.

The product of its digits is 162, while the sum is 22.

The square root of 3111961 is about 1764.0751117795. The cubic root of 3111961 is about 145.9972633502.

The spelling of 3111961 in words is "three million, one hundred eleven thousand, nine hundred sixty-one".