555040091 has 2 divisors, whose sum is σ = 555040092. Its totient is φ = 555040090.

The previous prime is 555040051. The next prime is 555040093. The reversal of 555040091 is 190040555.

555040091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 555040091 - 2¹⁸ = 554777947 is a prime.

Together with 555040093, 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 (555040093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277520045 + 277520046.

It is an arithmetic number, because the mean of its divisors is an integer number (277520046).

Almost surely, 2^555040091 is an apocalyptic number.

555040091 is a deficient number, since it is larger than the sum of its proper divisors (1).

555040091 is an equidigital number, since it uses as much as digits as its factorization.

555040091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 555040091 is about 23559.2888475013. The cubic root of 555040091 is about 821.8163637870.

The spelling of 555040091 in words is "five hundred fifty-five million, forty thousand, ninety-one".