53705287 has 2 divisors, whose sum is σ = 53705288. Its totient is φ = 53705286.

The previous prime is 53705279. The next prime is 53705293. The reversal of 53705287 is 78250735.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53705287 - 2³ = 53705279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53705387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26852643 + 26852644.

It is an arithmetic number, because the mean of its divisors is an integer number (26852644).

Almost surely, 2^53705287 is an apocalyptic number.

53705287 is a deficient number, since it is larger than the sum of its proper divisors (1).

53705287 is an equidigital number, since it uses as much as digits as its factorization.

53705287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 53705287 is about 7328.3891135774. The cubic root of 53705287 is about 377.2874396529.

The spelling of 53705287 in words is "fifty-three million, seven hundred five thousand, two hundred eighty-seven".