7838142817 has 2 divisors, whose sum is σ = 7838142818. Its totient is φ = 7838142816.

The previous prime is 7838142769. The next prime is 7838142839. The reversal of 7838142817 is 7182418387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6894977296 + 943165521 = 83036^2 + 30711^2 .

It is an emirp because it is prime and its reverse (7182418387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7838142817 - 2¹¹ = 7838140769 is a prime.

It is a super-2 number, since 2×7838142817² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7838149817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3919071408 + 3919071409.

It is an arithmetic number, because the mean of its divisors is an integer number (3919071409).

Almost surely, 2^7838142817 is an apocalyptic number.

It is an amenable number.

7838142817 is a deficient number, since it is larger than the sum of its proper divisors (1).

7838142817 is an equidigital number, since it uses as much as digits as its factorization.

7838142817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 602112, while the sum is 49.

The square root of 7838142817 is about 88533.2864915790. The cubic root of 7838142817 is about 1986.4199005689.

The spelling of 7838142817 in words is "seven billion, eight hundred thirty-eight million, one hundred forty-two thousand, eight hundred seventeen".