545817971 has 2 divisors, whose sum is σ = 545817972. Its totient is φ = 545817970.

The previous prime is 545817949. The next prime is 545817973. The reversal of 545817971 is 179718545.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 545817971 - 2⁶ = 545817907 is a prime.

Together with 545817973, 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 (545817973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272908985 + 272908986.

It is an arithmetic number, because the mean of its divisors is an integer number (272908986).

Almost surely, 2^545817971 is an apocalyptic number.

545817971 is a deficient number, since it is larger than the sum of its proper divisors (1).

545817971 is an equidigital number, since it uses as much as digits as its factorization.

545817971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 47.

The square root of 545817971 is about 23362.7475053770. The cubic root of 545817971 is about 817.2393635233.

The spelling of 545817971 in words is "five hundred forty-five million, eight hundred seventeen thousand, nine hundred seventy-one".