9880391 has 2 divisors, whose sum is σ = 9880392. Its totient is φ = 9880390.

The previous prime is 9880373. The next prime is 9880421. The reversal of 9880391 is 1930889.

9880391 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 cyclic number.

It is not a de Polignac number, because 9880391 - 2⁶ = 9880327 is a 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 (9880301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4940195 + 4940196.

It is an arithmetic number, because the mean of its divisors is an integer number (4940196).

Almost surely, 2^9880391 is an apocalyptic number.

9880391 is a deficient number, since it is larger than the sum of its proper divisors (1).

9880391 is an equidigital number, since it uses as much as digits as its factorization.

9880391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 9880391 is about 3143.3089253206. The cubic root of 9880391 is about 214.5810554654.

The spelling of 9880391 in words is "nine million, eight hundred eighty thousand, three hundred ninety-one".