38984922917 has 4 divisors (see below), whose sum is σ = 39624020076. Its totient is φ = 38345825760.

The previous prime is 38984922901. The next prime is 38984922943. The reversal of 38984922917 is 71922948983.

It is a Cunningham number, because it is equal to 197446²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71922948983 = 617 ⋅116568799.

It can be written as a sum of positive squares in 2 ways, for example, as 1267787236 + 37717135681 = 35606^2 + 194209^2 .

It is a cyclic number.

It is not a de Polignac number, because 38984922917 - 2⁴ = 38984922901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38984922917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38984922947) 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, 319548488 + ... + 319548609.

It is an arithmetic number, because the mean of its divisors is an integer number (9906005019).

Almost surely, 2^38984922917 is an apocalyptic number.

It is an amenable number.

38984922917 is a deficient number, since it is larger than the sum of its proper divisors (639097159).

38984922917 is an equidigital number, since it uses as much as digits as its factorization.

38984922917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639097158.

The product of its digits is 15676416, while the sum is 62.

The spelling of 38984922917 in words is "thirty-eight billion, nine hundred eighty-four million, nine hundred twenty-two thousand, nine hundred seventeen".