291319000871 has 2 divisors, whose sum is σ = 291319000872. Its totient is φ = 291319000870.

The previous prime is 291319000859. The next prime is 291319000879. The reversal of 291319000871 is 178000913192.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 291319000871 - 2⁶ = 291319000807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291319000879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145659500435 + 145659500436.

It is an arithmetic number, because the mean of its divisors is an integer number (145659500436).

Almost surely, 2^291319000871 is an apocalyptic number.

291319000871 is a deficient number, since it is larger than the sum of its proper divisors (1).

291319000871 is an equidigital number, since it uses as much as digits as its factorization.

291319000871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The spelling of 291319000871 in words is "two hundred ninety-one billion, three hundred nineteen million, eight hundred seventy-one", and thus it is an aban number.