9955267391 has 2 divisors, whose sum is σ = 9955267392. Its totient is φ = 9955267390.

The previous prime is 9955267339. The next prime is 9955267409. The reversal of 9955267391 is 1937625599.

It is a happy number.

9955267391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9955267391 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9955261391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4977633695 + 4977633696.

It is an arithmetic number, because the mean of its divisors is an integer number (4977633696).

Almost surely, 2^9955267391 is an apocalyptic number.

9955267391 is a deficient number, since it is larger than the sum of its proper divisors (1).

9955267391 is an equidigital number, since it uses as much as digits as its factorization.

9955267391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4592700, while the sum is 56.

The square root of 9955267391 is about 99776.0862682036. The cubic root of 9955267391 is about 2151.2174385639.

The spelling of 9955267391 in words is "nine billion, nine hundred fifty-five million, two hundred sixty-seven thousand, three hundred ninety-one".