53736209 has 2 divisors, whose sum is σ = 53736210. Its totient is φ = 53736208.

The previous prime is 53736203. The next prime is 53736253. The reversal of 53736209 is 90263735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53246209 + 490000 = 7297^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 53736209 - 2²⁴ = 36958993 is a prime.

It is a super-3 number, since 3×53736209³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (53736203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26868104 + 26868105.

It is an arithmetic number, because the mean of its divisors is an integer number (26868105).

Almost surely, 2^53736209 is an apocalyptic number.

It is an amenable number.

53736209 is a deficient number, since it is larger than the sum of its proper divisors (1).

53736209 is an equidigital number, since it uses as much as digits as its factorization.

53736209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 53736209 is about 7330.4985505762. The cubic root of 53736209 is about 377.3598362734.

The spelling of 53736209 in words is "fifty-three million, seven hundred thirty-six thousand, two hundred nine".