54785509 has 4 divisors (see below), whose sum is σ = 58008204. Its totient is φ = 51562816.

The previous prime is 54785501. The next prime is 54785527. The reversal of 54785509 is 90558745.

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 30283009 + 24502500 = 5503^2 + 4950^2 .

It is a cyclic number.

It is not a de Polignac number, because 54785509 - 2³ = 54785501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54785501) 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, 1611322 + ... + 1611355.

It is an arithmetic number, because the mean of its divisors is an integer number (14502051).

Almost surely, 2^54785509 is an apocalyptic number.

It is an amenable number.

54785509 is a deficient number, since it is larger than the sum of its proper divisors (3222695).

54785509 is a wasteful number, since it uses less digits than its factorization.

54785509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222694.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 54785509 is about 7401.7233804027. The cubic root of 54785509 is about 379.8002389586.

The spelling of 54785509 in words is "fifty-four million, seven hundred eighty-five thousand, five hundred nine".