9876861451 has 2 divisors, whose sum is σ = 9876861452. Its totient is φ = 9876861450.

The previous prime is 9876861439. The next prime is 9876861493. The reversal of 9876861451 is 1541686789.

It is a weak prime.

It is an emirp because it is prime and its reverse (1541686789) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9876861451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9876861392 and 9876861401.

It is not a weakly prime, because it can be changed into another prime (9876861431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4938430725 + 4938430726.

It is an arithmetic number, because the mean of its divisors is an integer number (4938430726).

Almost surely, 2^9876861451 is an apocalyptic number.

9876861451 is a deficient number, since it is larger than the sum of its proper divisors (1).

9876861451 is an equidigital number, since it uses as much as digits as its factorization.

9876861451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 55.

The square root of 9876861451 is about 99382.4001068600. The cubic root of 9876861451 is about 2145.5550099248. Note that the first 3 decimals are identical.

The spelling of 9876861451 in words is "nine billion, eight hundred seventy-six million, eight hundred sixty-one thousand, four hundred fifty-one".