8781379 has 2 divisors, whose sum is σ = 8781380. Its totient is φ = 8781378.

The previous prime is 8781373. The next prime is 8781397. The reversal of 8781379 is 9731878.

Together with next prime (8781397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8781379 - 2³ = 8781371 is a prime.

It is a super-2 number, since 2×8781379² = 154225234283282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8781371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4390689 + 4390690.

It is an arithmetic number, because the mean of its divisors is an integer number (4390690).

Almost surely, 2^8781379 is an apocalyptic number.

8781379 is a deficient number, since it is larger than the sum of its proper divisors (1).

8781379 is an equidigital number, since it uses as much as digits as its factorization.

8781379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 43.

The square root of 8781379 is about 2963.3391638488. The cubic root of 8781379 is about 206.3102983783.

The spelling of 8781379 in words is "eight million, seven hundred eighty-one thousand, three hundred seventy-nine".