347978347 has 2 divisors, whose sum is σ = 347978348. Its totient is φ = 347978346.

The previous prime is 347978333. The next prime is 347978353. The reversal of 347978347 is 743879743.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-347978347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 347978294 and 347978303.

It is not a weakly prime, because it can be changed into another prime (347978447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173989173 + 173989174.

It is an arithmetic number, because the mean of its divisors is an integer number (173989174).

Almost surely, 2^347978347 is an apocalyptic number.

347978347 is a deficient number, since it is larger than the sum of its proper divisors (1).

347978347 is an equidigital number, since it uses as much as digits as its factorization.

347978347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 52.

The square root of 347978347 is about 18654.1777358317. The cubic root of 347978347 is about 703.3703767966.

The spelling of 347978347 in words is "three hundred forty-seven million, nine hundred seventy-eight thousand, three hundred forty-seven".