53872009 has 4 divisors (see below), whose sum is σ = 54888516. Its totient is φ = 52855504.

The previous prime is 53872001. The next prime is 53872043. The reversal of 53872009 is 90027835.

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 44890000 + 8982009 = 6700^2 + 2997^2 .

It is a cyclic number.

It is not a de Polignac number, because 53872009 - 2³ = 53872001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53872001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508174 + ... + 508279.

It is an arithmetic number, because the mean of its divisors is an integer number (13722129).

Almost surely, 2^53872009 is an apocalyptic number.

It is an amenable number.

53872009 is a deficient number, since it is larger than the sum of its proper divisors (1016507).

53872009 is a wasteful number, since it uses less digits than its factorization.

53872009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016506.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 53872009 is about 7339.7553773951. The cubic root of 53872009 is about 377.6774517678.

It can be divided in two parts, 5387 and 2009, that added together give a square (7396 = 86²).

The spelling of 53872009 in words is "fifty-three million, eight hundred seventy-two thousand, nine".