291440917127 has 2 divisors, whose sum is σ = 291440917128. Its totient is φ = 291440917126.

The previous prime is 291440917111. The next prime is 291440917139. The reversal of 291440917127 is 721719044192.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 291440917127 - 2⁴ = 291440917111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291440917627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145720458563 + 145720458564.

It is an arithmetic number, because the mean of its divisors is an integer number (145720458564).

Almost surely, 2^291440917127 is an apocalyptic number.

291440917127 is a deficient number, since it is larger than the sum of its proper divisors (1).

291440917127 is an equidigital number, since it uses as much as digits as its factorization.

291440917127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 291440917127 in words is "two hundred ninety-one billion, four hundred forty million, nine hundred seventeen thousand, one hundred twenty-seven".