343878947 has 2 divisors, whose sum is σ = 343878948. Its totient is φ = 343878946.

The previous prime is 343878937. The next prime is 343878949. The reversal of 343878947 is 749878343.

It is a strong prime.

It is an emirp because it is prime and its reverse (749878343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343878947 - 2¹⁶ = 343813411 is a prime.

Together with 343878949, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (343878949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171939473 + 171939474.

It is an arithmetic number, because the mean of its divisors is an integer number (171939474).

Almost surely, 2^343878947 is an apocalyptic number.

343878947 is a deficient number, since it is larger than the sum of its proper divisors (1).

343878947 is an equidigital number, since it uses as much as digits as its factorization.

343878947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 53.

The square root of 343878947 is about 18543.9733336737. The cubic root of 343878947 is about 700.5974131236.

It can be divided in two parts, 34387 and 8947, that added together give a palindrome (43334).

The spelling of 343878947 in words is "three hundred forty-three million, eight hundred seventy-eight thousand, nine hundred forty-seven".