343631 has 2 divisors, whose sum is σ = 343632. Its totient is φ = 343630.

The previous prime is 343627. The next prime is 343639. The reversal of 343631 is 136343.

It is a weak prime.

It is an emirp because it is prime and its reverse (136343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343631 - 2² = 343627 is a prime.

It is a super-2 number, since 2×343631² = 236164528322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 343631.

It is not a weakly prime, because it can be changed into another prime (343639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171815 + 171816.

It is an arithmetic number, because the mean of its divisors is an integer number (171816).

2³⁴³⁶³¹ is an apocalyptic number.

343631 is a deficient number, since it is larger than the sum of its proper divisors (1).

343631 is an equidigital number, since it uses as much as digits as its factorization.

343631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 20.

The square root of 343631 is about 586.2004776525. The cubic root of 343631 is about 70.0428988745.

Adding to 343631 its reverse (136343), we get a palindrome (479974).

It can be divided in two parts, 3 and 43631, that added together give a palindrome (43634).

The spelling of 343631 in words is "three hundred forty-three thousand, six hundred thirty-one".