545890481 has 2 divisors, whose sum is σ = 545890482. Its totient is φ = 545890480.

The previous prime is 545890453. The next prime is 545890507. The reversal of 545890481 is 184098545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 510082225 + 35808256 = 22585^2 + 5984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545890481 is a prime.

It is a super-2 number, since 2×545890481² = 595992834492822722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (545890181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272945240 + 272945241.

It is an arithmetic number, because the mean of its divisors is an integer number (272945241).

Almost surely, 2^545890481 is an apocalyptic number.

It is an amenable number.

545890481 is a deficient number, since it is larger than the sum of its proper divisors (1).

545890481 is an equidigital number, since it uses as much as digits as its factorization.

545890481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 545890481 is about 23364.2992833083. The cubic root of 545890481 is about 817.2755510471.

The spelling of 545890481 in words is "five hundred forty-five million, eight hundred ninety thousand, four hundred eighty-one".