545431589 has 2 divisors, whose sum is σ = 545431590. Its totient is φ = 545431588.

The previous prime is 545431583. The next prime is 545431597. The reversal of 545431589 is 985134545.

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., 313113025 + 232318564 = 17695^2 + 15242^2 .

It is a cyclic number.

It is not a de Polignac number, because 545431589 - 2²⁰ = 544383013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545431583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272715794 + 272715795.

It is an arithmetic number, because the mean of its divisors is an integer number (272715795).

Almost surely, 2^545431589 is an apocalyptic number.

It is an amenable number.

545431589 is a deficient number, since it is larger than the sum of its proper divisors (1).

545431589 is an equidigital number, since it uses as much as digits as its factorization.

545431589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432000, while the sum is 44.

The square root of 545431589 is about 23354.4768513448. The cubic root of 545431589 is about 817.0464780220.

The spelling of 545431589 in words is "five hundred forty-five million, four hundred thirty-one thousand, five hundred eighty-nine".