291901 has 2 divisors, whose sum is σ = 291902. Its totient is φ = 291900.

The previous prime is 291899. The next prime is 291923. The reversal of 291901 is 109192.

It is an a-pointer prime, because the next prime (291923) can be obtained adding 291901 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202500 + 89401 = 450^2 + 299^2 .

It is a cyclic number.

It is not a de Polignac number, because 291901 - 2¹ = 291899 is a prime.

Together with 291899, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145950 + 145951.

It is an arithmetic number, because the mean of its divisors is an integer number (145951).

2²⁹¹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

291901 is a deficient number, since it is larger than the sum of its proper divisors (1).

291901 is an equidigital number, since it uses as much as digits as its factorization.

291901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 291901 is about 540.2786318188. The cubic root of 291901 is about 66.3353758676.

The spelling of 291901 in words is "two hundred ninety-one thousand, nine hundred one".