9781879 has 2 divisors, whose sum is σ = 9781880. Its totient is φ = 9781878.

The previous prime is 9781873. The next prime is 9781909.

9781879 is nontrivially palindromic in base 10.

9781879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 9781879 - 2¹⁵ = 9749111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9781873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4890939 + 4890940.

It is an arithmetic number, because the mean of its divisors is an integer number (4890940).

Almost surely, 2^9781879 is an apocalyptic number.

9781879 is a deficient number, since it is larger than the sum of its proper divisors (1).

9781879 is an equidigital number, since it uses as much as digits as its factorization.

9781879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 49.

The square root of 9781879 is about 3127.5995587671. The cubic root of 9781879 is about 213.8655151185.

The spelling of 9781879 in words is "nine million, seven hundred eighty-one thousand, eight hundred seventy-nine".