343764989 has 2 divisors, whose sum is σ = 343764990. Its totient is φ = 343764988.

The previous prime is 343764979. The next prime is 343765067. The reversal of 343764989 is 989467343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335256100 + 8508889 = 18310^2 + 2917^2 .

It is an emirp because it is prime and its reverse (989467343) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343764989 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 343764989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343764959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171882494 + 171882495.

It is an arithmetic number, because the mean of its divisors is an integer number (171882495).

Almost surely, 2^343764989 is an apocalyptic number.

It is an amenable number.

343764989 is a deficient number, since it is larger than the sum of its proper divisors (1).

343764989 is an equidigital number, since it uses as much as digits as its factorization.

343764989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 53.

The square root of 343764989 is about 18540.9004366023. The cubic root of 343764989 is about 700.5200142777.

The spelling of 343764989 in words is "three hundred forty-three million, seven hundred sixty-four thousand, nine hundred eighty-nine".