54820309 has 4 divisors (see below), whose sum is σ = 54957420. Its totient is φ = 54683200.

The previous prime is 54820289. The next prime is 54820343. The reversal of 54820309 is 90302845.

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 48302500 + 6517809 = 6950^2 + 2553^2 .

It is a cyclic number.

It is not a de Polignac number, because 54820309 - 2¹⁷ = 54689237 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54820379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67954 + ... + 68755.

It is an arithmetic number, because the mean of its divisors is an integer number (13739355).

Almost surely, 2^54820309 is an apocalyptic number.

It is an amenable number.

54820309 is a deficient number, since it is larger than the sum of its proper divisors (137111).

54820309 is a wasteful number, since it uses less digits than its factorization.

54820309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137110.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 54820309 is about 7404.0738110854. The cubic root of 54820309 is about 379.8806388736.

The spelling of 54820309 in words is "fifty-four million, eight hundred twenty thousand, three hundred nine".