647610426347 has 2 divisors, whose sum is σ = 647610426348. Its totient is φ = 647610426346.

The previous prime is 647610426329. The next prime is 647610426349. The reversal of 647610426347 is 743624016746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647610426347 - 2⁶ = 647610426283 is a prime.

It is a super-2 number, since 2×647610426347² (a number of 24 digits) contains 22 as substring.

Together with 647610426349, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 647610426295 and 647610426304.

It is not a weakly prime, because it can be changed into another prime (647610426349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323805213173 + 323805213174.

It is an arithmetic number, because the mean of its divisors is an integer number (323805213174).

Almost surely, 2^647610426347 is an apocalyptic number.

647610426347 is a deficient number, since it is larger than the sum of its proper divisors (1).

647610426347 is an equidigital number, since it uses as much as digits as its factorization.

647610426347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 50.

The spelling of 647610426347 in words is "six hundred forty-seven billion, six hundred ten million, four hundred twenty-six thousand, three hundred forty-seven".