3131943 has 4 divisors (see below), whose sum is σ = 4175928. Its totient is φ = 2087960.

The previous prime is 3131917. The next prime is 3131951. The reversal of 3131943 is 3491313.

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

It is a cyclic number.

It is not a de Polignac number, because 3131943 - 2⁵ = 3131911 is a prime.

It is a D-number.

3131943 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131983) 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, 521988 + ... + 521993.

It is an arithmetic number, because the mean of its divisors is an integer number (1043982).

Almost surely, 2^3131943 is an apocalyptic number.

3131943 is a deficient number, since it is larger than the sum of its proper divisors (1043985).

3131943 is a wasteful number, since it uses less digits than its factorization.

3131943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043984.

The product of its digits is 972, while the sum is 24.

The square root of 3131943 is about 1769.7296403688. The cubic root of 3131943 is about 146.3090812504.

The spelling of 3131943 in words is "three million, one hundred thirty-one thousand, nine hundred forty-three".