343667381 has 4 divisors (see below), whose sum is σ = 343809600. Its totient is φ = 343525164.

The previous prime is 343667327. The next prime is 343667437. The reversal of 343667381 is 183766343.

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 a de Polignac number, because none of the positive numbers 2^k-343667381 is a prime.

It is a super-2 number, since 2×343667381² = 236214537526798322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343667281) 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, 67421 + ... + 72338.

It is an arithmetic number, because the mean of its divisors is an integer number (85952400).

Almost surely, 2^343667381 is an apocalyptic number.

It is an amenable number.

343667381 is a deficient number, since it is larger than the sum of its proper divisors (142219).

343667381 is a wasteful number, since it uses less digits than its factorization.

343667381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142218.

The product of its digits is 217728, while the sum is 41.

The square root of 343667381 is about 18538.2680151086. The cubic root of 343667381 is about 700.4537065458.

The spelling of 343667381 in words is "three hundred forty-three million, six hundred sixty-seven thousand, three hundred eighty-one".