545181997 has 2 divisors, whose sum is σ = 545181998. Its totient is φ = 545181996.

The previous prime is 545181983. The next prime is 545182003. The reversal of 545181997 is 799181545.

545181997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 532178761 + 13003236 = 23069^2 + 3606^2 .

It is a cyclic number.

It is not a de Polignac number, because 545181997 - 2¹⁹ = 544657709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 545181997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545181977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272590998 + 272590999.

It is an arithmetic number, because the mean of its divisors is an integer number (272590999).

Almost surely, 2^545181997 is an apocalyptic number.

It is an amenable number.

545181997 is a deficient number, since it is larger than the sum of its proper divisors (1).

545181997 is an equidigital number, since it uses as much as digits as its factorization.

545181997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 49.

The square root of 545181997 is about 23349.1326819649. The cubic root of 545181997 is about 816.9218309335.

The spelling of 545181997 in words is "five hundred forty-five million, one hundred eighty-one thousand, nine hundred ninety-seven".