343605491 has 2 divisors, whose sum is σ = 343605492. Its totient is φ = 343605490.

The previous prime is 343605407. The next prime is 343605517. The reversal of 343605491 is 194506343.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 343605491 - 2¹⁰ = 343604467 is a prime.

It is equal to p_18478304 and since 343605491 and 18478304 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (343605401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171802745 + 171802746.

It is an arithmetic number, because the mean of its divisors is an integer number (171802746).

Almost surely, 2^343605491 is an apocalyptic number.

343605491 is a deficient number, since it is larger than the sum of its proper divisors (1).

343605491 is an equidigital number, since it uses as much as digits as its factorization.

343605491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 343605491 is about 18536.5986901589. The cubic root of 343605491 is about 700.4116565047.

The spelling of 343605491 in words is "three hundred forty-three million, six hundred five thousand, four hundred ninety-one".