343731 has 4 divisors (see below), whose sum is σ = 458312. Its totient is φ = 229152.

The previous prime is 343727. The next prime is 343769. The reversal of 343731 is 137343.

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

It is not a de Polignac number, because 343731 - 2² = 343727 is a prime.

It is a super-2 number, since 2×343731² = 236302000722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 343698 and 343707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57286 + ... + 57291.

It is an arithmetic number, because the mean of its divisors is an integer number (114578).

2³⁴³⁷³¹ is an apocalyptic number.

343731 is a deficient number, since it is larger than the sum of its proper divisors (114581).

343731 is a wasteful number, since it uses less digits than its factorization.

343731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114580.

The product of its digits is 756, while the sum is 21.

The square root of 343731 is about 586.2857664996. The cubic root of 343731 is about 70.0496926063.

It can be divided in two parts, 3 and 43731, that added together give a palindrome (43734).

The spelling of 343731 in words is "three hundred forty-three thousand, seven hundred thirty-one".