340144421 has 2 divisors, whose sum is σ = 340144422. Its totient is φ = 340144420.

The previous prime is 340144417. The next prime is 340144423. The reversal of 340144421 is 124441043.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198415396 + 141729025 = 14086^2 + 11905^2 .

It is a cyclic number.

It is not a de Polignac number, because 340144421 - 2² = 340144417 is a prime.

Together with 340144423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340144423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170072210 + 170072211.

It is an arithmetic number, because the mean of its divisors is an integer number (170072211).

Almost surely, 2^340144421 is an apocalyptic number.

It is an amenable number.

340144421 is a deficient number, since it is larger than the sum of its proper divisors (1).

340144421 is an equidigital number, since it uses as much as digits as its factorization.

340144421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 340144421 is about 18443.0046630152. The cubic root of 340144421 is about 698.0520133488.

Adding to 340144421 its reverse (124441043), we get a palindrome (464585464).

The spelling of 340144421 in words is "three hundred forty million, one hundred forty-four thousand, four hundred twenty-one".