545749993 has 2 divisors, whose sum is σ = 545749994. Its totient is φ = 545749992.

The previous prime is 545749991. The next prime is 545749999. The reversal of 545749993 is 399947545.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434805904 + 110944089 = 20852^2 + 10533^2 .

It is a cyclic number.

It is not a de Polignac number, because 545749993 - 2¹ = 545749991 is a prime.

Together with 545749991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (545749991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272874996 + 272874997.

It is an arithmetic number, because the mean of its divisors is an integer number (272874997).

Almost surely, 2^545749993 is an apocalyptic number.

It is an amenable number.

545749993 is a deficient number, since it is larger than the sum of its proper divisors (1).

545749993 is an equidigital number, since it uses as much as digits as its factorization.

545749993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6123600, while the sum is 55.

The square root of 545749993 is about 23361.2926226269. The cubic root of 545749993 is about 817.2054348714.

The spelling of 545749993 in words is "five hundred forty-five million, seven hundred forty-nine thousand, nine hundred ninety-three".