3131603 has 2 divisors, whose sum is σ = 3131604. Its totient is φ = 3131602.

The previous prime is 3131593. The next prime is 3131629. The reversal of 3131603 is 3061313.

It is a weak prime.

It is an emirp because it is prime and its reverse (3061313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3131603 - 2¹⁶ = 3066067 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (3131203) 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, 1565801 + 1565802.

It is an arithmetic number, because the mean of its divisors is an integer number (1565802).

Almost surely, 2^3131603 is an apocalyptic number.

3131603 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131603 is an equidigital number, since it uses as much as digits as its factorization.

3131603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 3131603 is about 1769.6335778912. The cubic root of 3131603 is about 146.3037866789.

Adding to 3131603 its reverse (3061313), we get a palindrome (6192916).

The spelling of 3131603 in words is "three million, one hundred thirty-one thousand, six hundred three".