291438107927 has 2 divisors, whose sum is σ = 291438107928. Its totient is φ = 291438107926.

The previous prime is 291438107837. The next prime is 291438107971. The reversal of 291438107927 is 729701834192.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 291438107927 - 2¹⁰ = 291438106903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291438107027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145719053963 + 145719053964.

It is an arithmetic number, because the mean of its divisors is an integer number (145719053964).

Almost surely, 2^291438107927 is an apocalyptic number.

291438107927 is a deficient number, since it is larger than the sum of its proper divisors (1).

291438107927 is an equidigital number, since it uses as much as digits as its factorization.

291438107927 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 291438107927 in words is "two hundred ninety-one billion, four hundred thirty-eight million, one hundred seven thousand, nine hundred twenty-seven".