343853989 has 2 divisors, whose sum is σ = 343853990. Its totient is φ = 343853988.

The previous prime is 343853981. The next prime is 343854013. The reversal of 343853989 is 989358343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309161889 + 34692100 = 17583^2 + 5890^2 .

It is a cyclic number.

It is not a de Polignac number, because 343853989 - 2³ = 343853981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343853981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171926994 + 171926995.

It is an arithmetic number, because the mean of its divisors is an integer number (171926995).

Almost surely, 2^343853989 is an apocalyptic number.

It is an amenable number.

343853989 is a deficient number, since it is larger than the sum of its proper divisors (1).

343853989 is an equidigital number, since it uses as much as digits as its factorization.

343853989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 52.

The square root of 343853989 is about 18543.3003804609. The cubic root of 343853989 is about 700.5804634252.

The spelling of 343853989 in words is "three hundred forty-three million, eight hundred fifty-three thousand, nine hundred eighty-nine".