68563853 has 2 divisors, whose sum is σ = 68563854. Its totient is φ = 68563852.

The previous prime is 68563823. The next prime is 68563861. The reversal of 68563853 is 35836586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51811204 + 16752649 = 7198^2 + 4093^2 .

It is a cyclic number.

It is not a de Polignac number, because 68563853 - 2²⁶ = 1454989 is a prime.

It is a super-3 number, since 3×68563853³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68563823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34281926 + 34281927.

It is an arithmetic number, because the mean of its divisors is an integer number (34281927).

Almost surely, 2^68563853 is an apocalyptic number.

It is an amenable number.

68563853 is a deficient number, since it is larger than the sum of its proper divisors (1).

68563853 is an equidigital number, since it uses as much as digits as its factorization.

68563853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 44.

The square root of 68563853 is about 8280.3292808922. The cubic root of 68563853 is about 409.2905697179.

The spelling of 68563853 in words is "sixty-eight million, five hundred sixty-three thousand, eight hundred fifty-three".