343439989 has 2 divisors, whose sum is σ = 343439990. Its totient is φ = 343439988.

The previous prime is 343439983. The next prime is 343440017. The reversal of 343439989 is 989934343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329712964 + 13727025 = 18158^2 + 3705^2 .

It is a cyclic number.

It is not a de Polignac number, because 343439989 - 2³ = 343439981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343439981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171719994 + 171719995.

It is an arithmetic number, because the mean of its divisors is an integer number (171719995).

Almost surely, 2^343439989 is an apocalyptic number.

It is an amenable number.

343439989 is a deficient number, since it is larger than the sum of its proper divisors (1).

343439989 is an equidigital number, since it uses as much as digits as its factorization.

343439989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 52.

The square root of 343439989 is about 18532.1339569948. The cubic root of 343439989 is about 700.2991843534.

The spelling of 343439989 in words is "three hundred forty-three million, four hundred thirty-nine thousand, nine hundred eighty-nine".