549280091 has 2 divisors, whose sum is σ = 549280092. Its totient is φ = 549280090.

The previous prime is 549280079. The next prime is 549280111. The reversal of 549280091 is 190082945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 549280091 - 2¹⁴ = 549263707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (549280001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274640045 + 274640046.

It is an arithmetic number, because the mean of its divisors is an integer number (274640046).

Almost surely, 2^549280091 is an apocalyptic number.

549280091 is a deficient number, since it is larger than the sum of its proper divisors (1).

549280091 is an equidigital number, since it uses as much as digits as its factorization.

549280091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 549280091 is about 23436.7252618620. The cubic root of 549280091 is about 818.9636376948.

The spelling of 549280091 in words is "five hundred forty-nine million, two hundred eighty thousand, ninety-one".