344008921 has 2 divisors, whose sum is σ = 344008922. Its totient is φ = 344008920.

The previous prime is 344008919. The next prime is 344008961. The reversal of 344008921 is 129800443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 332880025 + 11128896 = 18245^2 + 3336^2 .

It is an emirp because it is prime and its reverse (129800443) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 344008921 - 2¹ = 344008919 is a prime.

Together with 344008919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (344008961) 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, 172004460 + 172004461.

It is an arithmetic number, because the mean of its divisors is an integer number (172004461).

Almost surely, 2^344008921 is an apocalyptic number.

It is an amenable number.

344008921 is a deficient number, since it is larger than the sum of its proper divisors (1).

344008921 is an equidigital number, since it uses as much as digits as its factorization.

344008921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 344008921 is about 18547.4774834747. The cubic root of 344008921 is about 700.6856689657.

The spelling of 344008921 in words is "three hundred forty-four million, eight thousand, nine hundred twenty-one".