54965509 has 4 divisors (see below), whose sum is σ = 54980460. Its totient is φ = 54950560.

The previous prime is 54965507. The next prime is 54965531. The reversal of 54965509 is 90556945.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 31472100 + 23493409 = 5610^2 + 4847^2 .

It is a cyclic number.

It is not a de Polignac number, because 54965509 - 2¹ = 54965507 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 (54965507) 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, 2307 + ... + 10735.

It is an arithmetic number, because the mean of its divisors is an integer number (13745115).

Almost surely, 2^54965509 is an apocalyptic number.

It is an amenable number.

54965509 is a deficient number, since it is larger than the sum of its proper divisors (14951).

54965509 is an equidigital number, since it uses as much as digits as its factorization.

54965509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14950.

The product of its (nonzero) digits is 243000, while the sum is 43.

The square root of 54965509 is about 7413.8727396685. The cubic root of 54965509 is about 380.2157339175.

The spelling of 54965509 in words is "fifty-four million, nine hundred sixty-five thousand, five hundred nine".