3131671 has 2 divisors, whose sum is σ = 3131672. Its totient is φ = 3131670.

The previous prime is 3131669. The next prime is 3131699. The reversal of 3131671 is 1761313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3131671 - 2¹ = 3131669 is a prime.

Together with 3131669, it forms a pair of twin primes.

3131671 is a lucky number.

It is equal to p₂₂₅₆₃₄ and since 3131671 and 225634 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131641) 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 as a sum of consecutive naturals, namely, 1565835 + 1565836.

It is an arithmetic number, because the mean of its divisors is an integer number (1565836).

Almost surely, 2^3131671 is an apocalyptic number.

3131671 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131671 is an equidigital number, since it uses as much as digits as its factorization.

3131671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 22.

The square root of 3131671 is about 1769.6527908039. The cubic root of 3131671 is about 146.3048456239.

Adding to 3131671 its reverse (1761313), we get a palindrome (4892984).

The spelling of 3131671 in words is "three million, one hundred thirty-one thousand, six hundred seventy-one".