344408381 has 2 divisors, whose sum is σ = 344408382. Its totient is φ = 344408380.

The previous prime is 344408377. The next prime is 344408387. The reversal of 344408381 is 183804443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338928100 + 5480281 = 18410^2 + 2341^2 .

It is an emirp because it is prime and its reverse (183804443) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 344408381 - 2² = 344408377 is a prime.

It is a super-2 number, since 2×344408381² = 237234265806082322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344408387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172204190 + 172204191.

It is an arithmetic number, because the mean of its divisors is an integer number (172204191).

Almost surely, 2^344408381 is an apocalyptic number.

It is an amenable number.

344408381 is a deficient number, since it is larger than the sum of its proper divisors (1).

344408381 is an equidigital number, since it uses as much as digits as its factorization.

344408381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 344408381 is about 18558.2429394595. The cubic root of 344408381 is about 700.9567739793.

The spelling of 344408381 in words is "three hundred forty-four million, four hundred eight thousand, three hundred eighty-one".