68856553 has 2 divisors, whose sum is σ = 68856554. Its totient is φ = 68856552.

The previous prime is 68856509. The next prime is 68856577. The reversal of 68856553 is 35565886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65804544 + 3052009 = 8112^2 + 1747^2 .

It is a cyclic number.

It is not a de Polignac number, because 68856553 - 2²⁵ = 35302121 is a prime.

It is not a weakly prime, because it can be changed into another prime (68857553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34428276 + 34428277.

It is an arithmetic number, because the mean of its divisors is an integer number (34428277).

Almost surely, 2^68856553 is an apocalyptic number.

It is an amenable number.

68856553 is a deficient number, since it is larger than the sum of its proper divisors (1).

68856553 is an equidigital number, since it uses as much as digits as its factorization.

68856553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864000, while the sum is 46.

The square root of 68856553 is about 8297.9848758599. The cubic root of 68856553 is about 409.8721651829.

The spelling of 68856553 in words is "sixty-eight million, eight hundred fifty-six thousand, five hundred fifty-three".