53705009 has 2 divisors, whose sum is σ = 53705010. Its totient is φ = 53705008.

The previous prime is 53704999. The next prime is 53705011. The reversal of 53705009 is 90050735.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45265984 + 8439025 = 6728^2 + 2905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53705009 is a prime.

Together with 53705011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53705209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26852504 + 26852505.

It is an arithmetic number, because the mean of its divisors is an integer number (26852505).

Almost surely, 2^53705009 is an apocalyptic number.

It is an amenable number.

53705009 is a deficient number, since it is larger than the sum of its proper divisors (1).

53705009 is an equidigital number, since it uses as much as digits as its factorization.

53705009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4725, while the sum is 29.

The square root of 53705009 is about 7328.3701462194. The cubic root of 53705009 is about 377.2867886550.

The spelling of 53705009 in words is "fifty-three million, seven hundred five thousand, nine".