343946391 has 4 divisors (see below), whose sum is σ = 458595192. Its totient is φ = 229297592.

The previous prime is 343946381. The next prime is 343946411. The reversal of 343946391 is 193649343.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 343946391 - 2⁶ = 343946327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343946311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57324396 + ... + 57324401.

It is an arithmetic number, because the mean of its divisors is an integer number (114648798).

Almost surely, 2^343946391 is an apocalyptic number.

343946391 is a deficient number, since it is larger than the sum of its proper divisors (114648801).

343946391 is a wasteful number, since it uses less digits than its factorization.

343946391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114648800.

The product of its digits is 209952, while the sum is 42.

The square root of 343946391 is about 18545.7917328973. The cubic root of 343946391 is about 700.6432121890.

The spelling of 343946391 in words is "three hundred forty-three million, nine hundred forty-six thousand, three hundred ninety-one".