343900399 has 8 divisors (see below), whose sum is σ = 362278640. Its totient is φ = 325550016.

The previous prime is 343900397. The next prime is 343900441. The reversal of 343900399 is 993009343.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 343900399 - 2¹ = 343900397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343900397) 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 7 ways as a sum of consecutive naturals, for example, 21379 + ... + 33835.

It is an arithmetic number, because the mean of its divisors is an integer number (45284830).

Almost surely, 2^343900399 is an apocalyptic number.

343900399 is a deficient number, since it is larger than the sum of its proper divisors (18378241).

343900399 is a wasteful number, since it uses less digits than its factorization.

343900399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13929.

The product of its (nonzero) digits is 78732, while the sum is 40.

The square root of 343900399 is about 18544.5517335955. The cubic root of 343900399 is about 700.6119811407.

The spelling of 343900399 in words is "three hundred forty-three million, nine hundred thousand, three hundred ninety-nine".