38549471687 has 2 divisors, whose sum is σ = 38549471688. Its totient is φ = 38549471686.

The previous prime is 38549471657. The next prime is 38549471717. The reversal of 38549471687 is 78617494583.

It is a balanced prime because it is at equal distance from previous prime (38549471657) and next prime (38549471717).

It is an emirp because it is prime and its reverse (78617494583) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38549471687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38549471617) 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, 19274735843 + 19274735844.

It is an arithmetic number, because the mean of its divisors is an integer number (19274735844).

Almost surely, 2^38549471687 is an apocalyptic number.

38549471687 is a deficient number, since it is larger than the sum of its proper divisors (1).

38549471687 is an equidigital number, since it uses as much as digits as its factorization.

38549471687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 62.

The spelling of 38549471687 in words is "thirty-eight billion, five hundred forty-nine million, four hundred seventy-one thousand, six hundred eighty-seven".