947380009391 has 2 divisors, whose sum is σ = 947380009392. Its totient is φ = 947380009390.

The previous prime is 947380009349. The next prime is 947380009397. The reversal of 947380009391 is 193900083749.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 947380009391 - 2¹⁸ = 947379747247 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 (947380009397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473690004695 + 473690004696.

It is an arithmetic number, because the mean of its divisors is an integer number (473690004696).

Almost surely, 2^947380009391 is an apocalyptic number.

947380009391 is a deficient number, since it is larger than the sum of its proper divisors (1).

947380009391 is an equidigital number, since it uses as much as digits as its factorization.

947380009391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The spelling of 947380009391 in words is "nine hundred forty-seven billion, three hundred eighty million, nine thousand, three hundred ninety-one".