53417209 has 4 divisors (see below), whose sum is σ = 53757604. Its totient is φ = 53076816.

The previous prime is 53417173. The next prime is 53417237. The reversal of 53417209 is 90271435.

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 28944400 + 24472809 = 5380^2 + 4947^2 .

It is a cyclic number.

It is not a de Polignac number, because 53417209 - 2⁹ = 53416697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53417249) 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, 169962 + ... + 170275.

It is an arithmetic number, because the mean of its divisors is an integer number (13439401).

Almost surely, 2^53417209 is an apocalyptic number.

It is an amenable number.

53417209 is a deficient number, since it is larger than the sum of its proper divisors (340395).

53417209 is a wasteful number, since it uses less digits than its factorization.

53417209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340394.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 53417209 is about 7308.7077517164. The cubic root of 53417209 is about 376.6116332611.

The spelling of 53417209 in words is "fifty-three million, four hundred seventeen thousand, two hundred nine".