54209987 has 8 divisors (see below), whose sum is σ = 58531200. Its totient is φ = 49910400.

The previous prime is 54209963. The next prime is 54210017. The reversal of 54209987 is 78990245.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54209987 - 2¹² = 54205891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54209087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14 + ... + 10412.

It is an arithmetic number, because the mean of its divisors is an integer number (7316400).

Almost surely, 2^54209987 is an apocalyptic number.

54209987 is a deficient number, since it is larger than the sum of its proper divisors (4321213).

54209987 is a wasteful number, since it uses less digits than its factorization.

54209987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10813.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 54209987 is about 7362.7431708569. The cubic root of 54209987 is about 378.4656202359.

The spelling of 54209987 in words is "fifty-four million, two hundred nine thousand, nine hundred eighty-seven".