545455091 has 2 divisors, whose sum is σ = 545455092. Its totient is φ = 545455090.

The previous prime is 545455087. The next prime is 545455093. The reversal of 545455091 is 190554545.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 545455091 - 2² = 545455087 is a prime.

Together with 545455093, 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 (545455093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272727545 + 272727546.

It is an arithmetic number, because the mean of its divisors is an integer number (272727546).

Almost surely, 2^545455091 is an apocalyptic number.

545455091 is a deficient number, since it is larger than the sum of its proper divisors (1).

545455091 is an equidigital number, since it uses as much as digits as its factorization.

545455091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90000, while the sum is 38.

The square root of 545455091 is about 23354.9800042732. The cubic root of 545455091 is about 817.0582130412.

The spelling of 545455091 in words is "five hundred forty-five million, four hundred fifty-five thousand, ninety-one".