545451999 has 4 divisors (see below), whose sum is σ = 727269336. Its totient is φ = 363634664.

The previous prime is 545451997. The next prime is 545452009. The reversal of 545451999 is 999154545.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 545451999 - 2¹ = 545451997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545451997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90908664 + ... + 90908669.

It is an arithmetic number, because the mean of its divisors is an integer number (181817334).

Almost surely, 2^545451999 is an apocalyptic number.

545451999 is a deficient number, since it is larger than the sum of its proper divisors (181817337).

545451999 is a wasteful number, since it uses less digits than its factorization.

545451999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181817336.

The product of its digits is 1458000, while the sum is 51.

The square root of 545451999 is about 23354.9138084472. The cubic root of 545451999 is about 817.0566691629.

The spelling of 545451999 in words is "five hundred forty-five million, four hundred fifty-one thousand, nine hundred ninety-nine".