545493931 has 2 divisors, whose sum is σ = 545493932. Its totient is φ = 545493930.

The previous prime is 545493929. The next prime is 545493947. The reversal of 545493931 is 139394545.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 545493931 - 2¹ = 545493929 is a prime.

It is a super-2 number, since 2×545493931² = 595127257515665522, which contains 22 as substring.

Together with 545493929, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (545493901) 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, 272746965 + 272746966.

It is an arithmetic number, because the mean of its divisors is an integer number (272746966).

Almost surely, 2^545493931 is an apocalyptic number.

545493931 is a deficient number, since it is larger than the sum of its proper divisors (1).

545493931 is an equidigital number, since it uses as much as digits as its factorization.

545493931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 43.

The square root of 545493931 is about 23355.8115037778. The cubic root of 545493931 is about 817.0776058921.

The spelling of 545493931 in words is "five hundred forty-five million, four hundred ninety-three thousand, nine hundred thirty-one".