638274000347 has 2 divisors, whose sum is σ = 638274000348. Its totient is φ = 638274000346.

The previous prime is 638274000307. The next prime is 638274000349. The reversal of 638274000347 is 743000472836.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-638274000347 is a prime.

It is a super-2 number, since 2×638274000347² (a number of 24 digits) contains 22 as substring.

Together with 638274000349, 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 = 638274000298 and 638274000307.

It is not a weakly prime, because it can be changed into another prime (638274000349) 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 as a sum of consecutive naturals, namely, 319137000173 + 319137000174.

It is an arithmetic number, because the mean of its divisors is an integer number (319137000174).

Almost surely, 2^638274000347 is an apocalyptic number.

638274000347 is a deficient number, since it is larger than the sum of its proper divisors (1).

638274000347 is an equidigital number, since it uses as much as digits as its factorization.

638274000347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 44.

The spelling of 638274000347 in words is "six hundred thirty-eight billion, two hundred seventy-four million, three hundred forty-seven", and thus it is an aban number.