545992081 has 2 divisors, whose sum is σ = 545992082. Its totient is φ = 545992080.

The previous prime is 545992079. The next prime is 545992087. The reversal of 545992081 is 180299545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543635856 + 2356225 = 23316^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 545992081 - 2¹ = 545992079 is a prime.

It is a super-2 number, since 2×545992081² = 596214705029421122, which contains 22 as substring.

Together with 545992079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (545992087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272996040 + 272996041.

It is an arithmetic number, because the mean of its divisors is an integer number (272996041).

Almost surely, 2^545992081 is an apocalyptic number.

It is an amenable number.

545992081 is a deficient number, since it is larger than the sum of its proper divisors (1).

545992081 is an equidigital number, since it uses as much as digits as its factorization.

545992081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 545992081 is about 23366.4734395244. The cubic root of 545992081 is about 817.3262511099.

The spelling of 545992081 in words is "five hundred forty-five million, nine hundred ninety-two thousand, eighty-one".