344345381 has 2 divisors, whose sum is σ = 344345382. Its totient is φ = 344345380.

The previous prime is 344345369. The next prime is 344345411. The reversal of 344345381 is 183543443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 333062500 + 11282881 = 18250^2 + 3359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344345381 is a prime.

It is a super-2 number, since 2×344345381² = 237147482832070322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344345311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172172690 + 172172691.

It is an arithmetic number, because the mean of its divisors is an integer number (172172691).

Almost surely, 2^344345381 is an apocalyptic number.

It is an amenable number.

344345381 is a deficient number, since it is larger than the sum of its proper divisors (1).

344345381 is an equidigital number, since it uses as much as digits as its factorization.

344345381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 35.

The square root of 344345381 is about 18556.5455028677. The cubic root of 344345381 is about 700.9140311464.

The spelling of 344345381 in words is "three hundred forty-four million, three hundred forty-five thousand, three hundred eighty-one".