545666437 has 2 divisors, whose sum is σ = 545666438. Its totient is φ = 545666436.

The previous prime is 545666423. The next prime is 545666441. The reversal of 545666437 is 734666545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 508322116 + 37344321 = 22546^2 + 6111^2 .

It is a cyclic number.

It is not a de Polignac number, because 545666437 - 2¹⁹ = 545142149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545666477) 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, 272833218 + 272833219.

It is an arithmetic number, because the mean of its divisors is an integer number (272833219).

Almost surely, 2^545666437 is an apocalyptic number.

It is an amenable number.

545666437 is a deficient number, since it is larger than the sum of its proper divisors (1).

545666437 is an equidigital number, since it uses as much as digits as its factorization.

545666437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 46.

The square root of 545666437 is about 23359.5042113483. The cubic root of 545666437 is about 817.1637271888.

The spelling of 545666437 in words is "five hundred forty-five million, six hundred sixty-six thousand, four hundred thirty-seven".