7868376389 has 2 divisors, whose sum is σ = 7868376390. Its totient is φ = 7868376388.

The previous prime is 7868376323. The next prime is 7868376391. The reversal of 7868376389 is 9836738687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6708429025 + 1159947364 = 81905^2 + 34058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7868376389 is a prime.

It is a super-2 number, since 2×7868376389² (a number of 21 digits) contains 22 as substring.

Together with 7868376391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7868372389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3934188194 + 3934188195.

It is an arithmetic number, because the mean of its divisors is an integer number (3934188195).

Almost surely, 2^7868376389 is an apocalyptic number.

It is an amenable number.

7868376389 is a deficient number, since it is larger than the sum of its proper divisors (1).

7868376389 is an equidigital number, since it uses as much as digits as its factorization.

7868376389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73156608, while the sum is 65.

The square root of 7868376389 is about 88703.8690757060. The cubic root of 7868376389 is about 1988.9706543237.

The spelling of 7868376389 in words is "seven billion, eight hundred sixty-eight million, three hundred seventy-six thousand, three hundred eighty-nine".