343738813 has 4 divisors (see below), whose sum is σ = 374987808. Its totient is φ = 312489820.

The previous prime is 343738781. The next prime is 343738849. The reversal of 343738813 is 318837343.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 343738813 - 2⁵ = 343738781 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343738883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15624481 + ... + 15624502.

It is an arithmetic number, because the mean of its divisors is an integer number (93746952).

Almost surely, 2^343738813 is an apocalyptic number.

It is an amenable number.

343738813 is a deficient number, since it is larger than the sum of its proper divisors (31248995).

343738813 is a wasteful number, since it uses less digits than its factorization.

343738813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31248994.

The product of its digits is 145152, while the sum is 40.

The square root of 343738813 is about 18540.1945243301. The cubic root of 343738813 is about 700.5022334507.

The spelling of 343738813 in words is "three hundred forty-three million, seven hundred thirty-eight thousand, eight hundred thirteen".