545390669 has 2 divisors, whose sum is σ = 545390670. Its totient is φ = 545390668.

The previous prime is 545390639. The next prime is 545390683. The reversal of 545390669 is 966093545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 536617225 + 8773444 = 23165^2 + 2962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545390669 is a prime.

It is a super-2 number, since 2×545390669² = 594901963664535122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545390609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272695334 + 272695335.

It is an arithmetic number, because the mean of its divisors is an integer number (272695335).

Almost surely, 2^545390669 is an apocalyptic number.

It is an amenable number.

545390669 is a deficient number, since it is larger than the sum of its proper divisors (1).

545390669 is an equidigital number, since it uses as much as digits as its factorization.

545390669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 874800, while the sum is 47.

The square root of 545390669 is about 23353.6007716155. The cubic root of 545390669 is about 817.0260450421.

The spelling of 545390669 in words is "five hundred forty-five million, three hundred ninety thousand, six hundred sixty-nine".