45339781 has 4 divisors (see below), whose sum is σ = 45741132. Its totient is φ = 44938432.

The previous prime is 45339779. The next prime is 45339793. The reversal of 45339781 is 18793354.

45339781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11222500 + 34117281 = 3350^2 + 5841^2 .

It is a cyclic number.

It is not a de Polignac number, because 45339781 - 2¹ = 45339779 is a prime.

It is a super-3 number, since 3×45339781³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45339881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200506 + ... + 200731.

It is an arithmetic number, because the mean of its divisors is an integer number (11435283).

Almost surely, 2^45339781 is an apocalyptic number.

It is an amenable number.

45339781 is a deficient number, since it is larger than the sum of its proper divisors (401351).

45339781 is a wasteful number, since it uses less digits than its factorization.

45339781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401350.

The product of its digits is 90720, while the sum is 40.

The square root of 45339781 is about 6733.4820858156. The cubic root of 45339781 is about 356.5823198029.

The spelling of 45339781 in words is "forty-five million, three hundred thirty-nine thousand, seven hundred eighty-one".