291194201 has 2 divisors, whose sum is σ = 291194202. Its totient is φ = 291194200.

The previous prime is 291194179. The next prime is 291194203. The reversal of 291194201 is 102491192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225600400 + 65593801 = 15020^2 + 8099^2 .

It is a cyclic number.

It is not a de Polignac number, because 291194201 - 2²² = 286999897 is a prime.

Together with 291194203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (291194203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145597100 + 145597101.

It is an arithmetic number, because the mean of its divisors is an integer number (145597101).

Almost surely, 2^291194201 is an apocalyptic number.

It is an amenable number.

291194201 is a deficient number, since it is larger than the sum of its proper divisors (1).

291194201 is an equidigital number, since it uses as much as digits as its factorization.

291194201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 291194201 is about 17064.4132919945. The cubic root of 291194201 is about 662.8179186609.

The spelling of 291194201 in words is "two hundred ninety-one million, one hundred ninety-four thousand, two hundred one".