3161918 has 4 divisors (see below), whose sum is σ = 4742880. Its totient is φ = 1580958.

The previous prime is 3161897. The next prime is 3161953. The reversal of 3161918 is 8191613.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 790478 + ... + 790481.

It is an arithmetic number, because the mean of its divisors is an integer number (1185720).

Almost surely, 2^3161918 is an apocalyptic number.

3161918 is a deficient number, since it is larger than the sum of its proper divisors (1580962).

3161918 is a wasteful number, since it uses less digits than its factorization.

3161918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580961.

The product of its digits is 1296, while the sum is 29.

The square root of 3161918 is about 1778.1782812755. The cubic root of 3161918 is about 146.7743619025.

The spelling of 3161918 in words is "three million, one hundred sixty-one thousand, nine hundred eighteen".