545440939 has 16 divisors (see below), whose sum is σ = 591754240. Its totient is φ = 501590880.

The previous prime is 545440933. The next prime is 545440981. The reversal of 545440939 is 939044545.

It is a cyclic number.

It is not a de Polignac number, because 545440939 - 2⁷ = 545440811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 545440895 and 545440904.

It is not an unprimeable number, because it can be changed into a prime (545440933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43792 + ... + 54850.

It is an arithmetic number, because the mean of its divisors is an integer number (36984640).

Almost surely, 2^545440939 is an apocalyptic number.

545440939 is a deficient number, since it is larger than the sum of its proper divisors (46313301).

545440939 is a wasteful number, since it uses less digits than its factorization.

545440939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11170.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 545440939 is about 23354.6770262404. The cubic root of 545440939 is about 817.0511467046.

The spelling of 545440939 in words is "five hundred forty-five million, four hundred forty thousand, nine hundred thirty-nine".