53604209 has 8 divisors (see below), whose sum is σ = 55661160. Its totient is φ = 51561216.

The previous prime is 53604197. The next prime is 53604211. The reversal of 53604209 is 90240635.

It can be written as a sum of positive squares in 4 ways, for example, as 270400 + 53333809 = 520^2 + 7303^2 .

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 53604209 - 2⁴ = 53604193 is a prime.

It is a super-2 number, since 2×53604209² = 5746822445031362, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53604259) 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, 4697 + ... + 11369.

It is an arithmetic number, because the mean of its divisors is an integer number (6957645).

Almost surely, 2^53604209 is an apocalyptic number.

It is an amenable number.

53604209 is a deficient number, since it is larger than the sum of its proper divisors (2056951).

53604209 is a wasteful number, since it uses less digits than its factorization.

53604209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6979.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 53604209 is about 7321.4895342410. The cubic root of 53604209 is about 377.0505951276.

The spelling of 53604209 in words is "fifty-three million, six hundred four thousand, two hundred nine".