3133681 has 4 divisors (see below), whose sum is σ = 3269952. Its totient is φ = 2997412.

The previous prime is 3133673. The next prime is 3133699. The reversal of 3133681 is 1863313.

It is a happy number.

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 3133681 - 2³ = 3133673 is a prime.

It is a super-2 number, since 2×3133681² = 19639913219522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3133181) 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, 68101 + ... + 68146.

It is an arithmetic number, because the mean of its divisors is an integer number (817488).

Almost surely, 2^3133681 is an apocalyptic number.

It is an amenable number.

3133681 is a deficient number, since it is larger than the sum of its proper divisors (136271).

3133681 is a wasteful number, since it uses less digits than its factorization.

3133681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136270.

The product of its digits is 1296, while the sum is 25.

The square root of 3133681 is about 1770.2206077210. The cubic root of 3133681 is about 146.3361398698.

Adding to 3133681 its reverse (1863313), we get a palindrome (4996994).

The spelling of 3133681 in words is "three million, one hundred thirty-three thousand, six hundred eighty-one".