340342631 has 2 divisors, whose sum is σ = 340342632. Its totient is φ = 340342630.

The previous prime is 340342589. The next prime is 340342633. The reversal of 340342631 is 136243043.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (136243043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340342631 is a prime.

It is a super-2 number, since 2×340342631² = 231666212952004322, which contains 22 as substring.

Together with 340342633, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340342631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340342633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170171315 + 170171316.

It is an arithmetic number, because the mean of its divisors is an integer number (170171316).

Almost surely, 2^340342631 is an apocalyptic number.

340342631 is a deficient number, since it is larger than the sum of its proper divisors (1).

340342631 is an equidigital number, since it uses as much as digits as its factorization.

340342631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 340342631 is about 18448.3774625304. The cubic root of 340342631 is about 698.1875773567.

Adding to 340342631 its reverse (136243043), we get a palindrome (476585674).

The spelling of 340342631 in words is "three hundred forty million, three hundred forty-two thousand, six hundred thirty-one".