54009665 has 4 divisors (see below), whose sum is σ = 64811604. Its totient is φ = 43207728.

The previous prime is 54009661. The next prime is 54009673. The reversal of 54009665 is 56690045.

It is a happy number.

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 14684224 + 39325441 = 3832^2 + 6271^2 .

It is a cyclic number.

It is not a de Polignac number, because 54009665 - 2² = 54009661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54009661) 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, 5400962 + ... + 5400971.

It is an arithmetic number, because the mean of its divisors is an integer number (16202901).

Almost surely, 2^54009665 is an apocalyptic number.

It is an amenable number.

54009665 is a deficient number, since it is larger than the sum of its proper divisors (10801939).

54009665 is a wasteful number, since it uses less digits than its factorization.

54009665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10801938.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 54009665 is about 7349.1268188813. The cubic root of 54009665 is about 377.9988638768.

The spelling of 54009665 in words is "fifty-four million, nine thousand, six hundred sixty-five".