347456785381 has 4 divisors (see below), whose sum is σ = 355931341164. Its totient is φ = 338982229600.

The previous prime is 347456785339. The next prime is 347456785391. The reversal of 347456785381 is 183587654743.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65633828481 + 281822956900 = 256191^2 + 530870^2 .

It is a cyclic number.

It is not a de Polignac number, because 347456785381 - 2⁹ = 347456784869 is a prime.

It is a super-2 number, since 2×347456785381² (a number of 24 digits) 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 (347456785391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4237277830 + ... + 4237277911.

It is an arithmetic number, because the mean of its divisors is an integer number (88982835291).

Almost surely, 2^347456785381 is an apocalyptic number.

It is an amenable number.

347456785381 is a deficient number, since it is larger than the sum of its proper divisors (8474555783).

347456785381 is an equidigital number, since it uses as much as digits as its factorization.

347456785381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8474555782.

The product of its digits is 67737600, while the sum is 61.

The spelling of 347456785381 in words is "three hundred forty-seven billion, four hundred fifty-six million, seven hundred eighty-five thousand, three hundred eighty-one".