344249021 has 2 divisors, whose sum is σ = 344249022. Its totient is φ = 344249020.

The previous prime is 344248987. The next prime is 344249071. The reversal of 344249021 is 120942443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315240025 + 29008996 = 17755^2 + 5386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344249021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344249071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172124510 + 172124511.

It is an arithmetic number, because the mean of its divisors is an integer number (172124511).

Almost surely, 2^344249021 is an apocalyptic number.

It is an amenable number.

344249021 is a deficient number, since it is larger than the sum of its proper divisors (1).

344249021 is an equidigital number, since it uses as much as digits as its factorization.

344249021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 344249021 is about 18553.9489327744. The cubic root of 344249021 is about 700.8486448794.

The spelling of 344249021 in words is "three hundred forty-four million, two hundred forty-nine thousand, twenty-one".