9881279 has 2 divisors, whose sum is σ = 9881280. Its totient is φ = 9881278.

The previous prime is 9881269. The next prime is 9881299. The reversal of 9881279 is 9721889.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9881279 - 2⁸ = 9881023 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9881239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4940639 + 4940640.

It is an arithmetic number, because the mean of its divisors is an integer number (4940640).

Almost surely, 2^9881279 is an apocalyptic number.

9881279 is a deficient number, since it is larger than the sum of its proper divisors (1).

9881279 is an equidigital number, since it uses as much as digits as its factorization.

9881279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 44.

The square root of 9881279 is about 3143.4501745693. The cubic root of 9881279 is about 214.5874837626.

Subtracting from 9881279 its sum of digits (44), we obtain a triangular number (9881235 = T₄₄₄₅).

The spelling of 9881279 in words is "nine million, eight hundred eighty-one thousand, two hundred seventy-nine".