3131663 has 4 divisors (see below), whose sum is σ = 3147600. Its totient is φ = 3115728.

The previous prime is 3131641. The next prime is 3131669. The reversal of 3131663 is 3661313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3661313 = 113 ⋅32401.

It is a cyclic number.

It is not a de Polignac number, because 3131663 - 2¹² = 3127567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131669) 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, 7670 + ... + 8067.

It is an arithmetic number, because the mean of its divisors is an integer number (786900).

Almost surely, 2^3131663 is an apocalyptic number.

3131663 is a deficient number, since it is larger than the sum of its proper divisors (15937).

3131663 is a wasteful number, since it uses less digits than its factorization.

3131663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15936.

The product of its digits is 972, while the sum is 23.

The square root of 3131663 is about 1769.6505304720. The cubic root of 3131663 is about 146.3047210429.

Adding to 3131663 its reverse (3661313), we get a palindrome (6792976).

The spelling of 3131663 in words is "three million, one hundred thirty-one thousand, six hundred sixty-three".