343815989 has 16 divisors (see below), whose sum is σ = 380790720. Its totient is φ = 307824000.

The previous prime is 343815961. The next prime is 343816021. The reversal of 343815989 is 989518343.

It is a de Polignac number, because none of the positive numbers 2^k-343815989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343815949) 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 in 15 ways as a sum of consecutive naturals, for example, 323519 + ... + 324579.

It is an arithmetic number, because the mean of its divisors is an integer number (23799420).

Almost surely, 2^343815989 is an apocalyptic number.

It is an amenable number.

343815989 is a deficient number, since it is larger than the sum of its proper divisors (36974731).

343815989 is a wasteful number, since it uses less digits than its factorization.

343815989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492.

The product of its digits is 933120, while the sum is 50.

The square root of 343815989 is about 18542.2757233302. The cubic root of 343815989 is about 700.5546549530.

The spelling of 343815989 in words is "three hundred forty-three million, eight hundred fifteen thousand, nine hundred eighty-nine".