343139989 has 2 divisors, whose sum is σ = 343139990. Its totient is φ = 343139988.

The previous prime is 343139983. The next prime is 343140037. The reversal of 343139989 is 989931343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247432900 + 95707089 = 15730^2 + 9783^2 .

It is a cyclic number.

It is not a de Polignac number, because 343139989 - 2¹³ = 343131797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343139983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171569994 + 171569995.

It is an arithmetic number, because the mean of its divisors is an integer number (171569995).

Almost surely, 2^343139989 is an apocalyptic number.

It is an amenable number.

343139989 is a deficient number, since it is larger than the sum of its proper divisors (1).

343139989 is an equidigital number, since it uses as much as digits as its factorization.

343139989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 49.

The square root of 343139989 is about 18524.0381396714. The cubic root of 343139989 is about 700.0952176597.

The spelling of 343139989 in words is "three hundred forty-three million, one hundred thirty-nine thousand, nine hundred eighty-nine".