53509237 has 2 divisors, whose sum is σ = 53509238. Its totient is φ = 53509236.

The previous prime is 53509231. The next prime is 53509241. The reversal of 53509237 is 73290535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53494596 + 14641 = 7314^2 + 121^2 .

It is a cyclic number.

It is not a de Polignac number, because 53509237 - 2¹¹ = 53507189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53509231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26754618 + 26754619.

It is an arithmetic number, because the mean of its divisors is an integer number (26754619).

Almost surely, 2^53509237 is an apocalyptic number.

It is an amenable number.

53509237 is a deficient number, since it is larger than the sum of its proper divisors (1).

53509237 is an equidigital number, since it uses as much as digits as its factorization.

53509237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28350, while the sum is 34.

The square root of 53509237 is about 7315.0008202324. Note that the first 3 decimals coincide. The cubic root of 53509237 is about 376.8277866411.

The spelling of 53509237 in words is "fifty-three million, five hundred nine thousand, two hundred thirty-seven".