340631 has 4 divisors (see below), whose sum is σ = 347112. Its totient is φ = 334152.

The previous prime is 340619. The next prime is 340633. The reversal of 340631 is 136043.

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 340631 - 2¹⁸ = 78487 is a prime.

It is a super-2 number, since 2×340631² = 232058956322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a zygodrome in base 6.

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 340631.

It is not an unprimeable number, because it can be changed into a prime (340633) 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, 3161 + ... + 3266.

It is an arithmetic number, because the mean of its divisors is an integer number (86778).

2³⁴⁰⁶³¹ is an apocalyptic number.

340631 is a deficient number, since it is larger than the sum of its proper divisors (6481).

340631 is an equidigital number, since it uses as much as digits as its factorization.

340631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 340631 is about 583.6360167090. The cubic root of 340631 is about 69.8384710871.

Adding to 340631 its reverse (136043), we get a palindrome (476674).

The spelling of 340631 in words is "three hundred forty thousand, six hundred thirty-one".