291149093 has 2 divisors, whose sum is σ = 291149094. Its totient is φ = 291149092.

The previous prime is 291149069. The next prime is 291149107. The reversal of 291149093 is 390941192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291111844 + 37249 = 17062^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 291149093 - 2⁶ = 291149029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291149693) 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, 145574546 + 145574547.

It is an arithmetic number, because the mean of its divisors is an integer number (145574547).

Almost surely, 2^291149093 is an apocalyptic number.

It is an amenable number.

291149093 is a deficient number, since it is larger than the sum of its proper divisors (1).

291149093 is an equidigital number, since it uses as much as digits as its factorization.

291149093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 291149093 is about 17063.0915428594. The cubic root of 291149093 is about 662.7836918636.

The spelling of 291149093 in words is "two hundred ninety-one million, one hundred forty-nine thousand, ninety-three".