68557901 has 2 divisors, whose sum is σ = 68557902. Its totient is φ = 68557900.

The previous prime is 68557897. The next prime is 68557919. The reversal of 68557901 is 10975586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64416676 + 4141225 = 8026^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 68557901 - 2² = 68557897 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68557921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34278950 + 34278951.

It is an arithmetic number, because the mean of its divisors is an integer number (34278951).

Almost surely, 2^68557901 is an apocalyptic number.

It is an amenable number.

68557901 is a deficient number, since it is larger than the sum of its proper divisors (1).

68557901 is an equidigital number, since it uses as much as digits as its factorization.

68557901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 68557901 is about 8279.9698670949. The cubic root of 68557901 is about 409.2787259262.

The spelling of 68557901 in words is "sixty-eight million, five hundred fifty-seven thousand, nine hundred one".