3131723 has 8 divisors (see below), whose sum is σ = 3789792. Its totient is φ = 2526336.

The previous prime is 3131701. The next prime is 3131743. The reversal of 3131723 is 3271313.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3131723 - 2⁸ = 3131467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131695 and 3131704.

It is not an unprimeable number, because it can be changed into a prime (3131743) 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 7 ways as a sum of consecutive naturals, for example, 13040 + ... + 13277.

It is an arithmetic number, because the mean of its divisors is an integer number (473724).

Almost surely, 2^3131723 is an apocalyptic number.

3131723 is a deficient number, since it is larger than the sum of its proper divisors (658069).

3131723 is a wasteful number, since it uses less digits than its factorization.

3131723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26341.

The product of its digits is 378, while the sum is 20.

The square root of 3131723 is about 1769.6674828905. The cubic root of 3131723 is about 146.3056553950.

The spelling of 3131723 in words is "three million, one hundred thirty-one thousand, seven hundred twenty-three".