291148201 has 2 divisors, whose sum is σ = 291148202. Its totient is φ = 291148200.

The previous prime is 291148199. The next prime is 291148219. The reversal of 291148201 is 102841192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206066025 + 85082176 = 14355^2 + 9224^2 .

It is a cyclic number.

It is not a de Polignac number, because 291148201 - 2¹ = 291148199 is a prime.

Together with 291148199, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 291148201.

It is not a weakly prime, because it can be changed into another prime (291148241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145574100 + 145574101.

It is an arithmetic number, because the mean of its divisors is an integer number (145574101).

Almost surely, 2^291148201 is an apocalyptic number.

It is an amenable number.

291148201 is a deficient number, since it is larger than the sum of its proper divisors (1).

291148201 is an equidigital number, since it uses as much as digits as its factorization.

291148201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 291148201 is about 17063.0654045514. The cubic root of 291148201 is about 662.7830150012.

Adding to 291148201 its reverse (102841192), we get a palindrome (393989393).

The spelling of 291148201 in words is "two hundred ninety-one million, one hundred forty-eight thousand, two hundred one".