68820353 has 6 divisors (see below), whose sum is σ = 80056386. Its totient is φ = 58988832.

The previous prime is 68820343. The next prime is 68820379. The reversal of 68820353 is 35302886.

It can be written as a sum of positive squares in only one way, i.e., 57577744 + 11242609 = 7588^2 + 3353^2 .

It is not a de Polignac number, because 68820353 - 2¹⁰ = 68819329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68820343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 702200 + ... + 702297.

It is an arithmetic number, because the mean of its divisors is an integer number (13342731).

Almost surely, 2^68820353 is an apocalyptic number.

It is an amenable number.

68820353 is a deficient number, since it is larger than the sum of its proper divisors (11236033).

68820353 is a wasteful number, since it uses less digits than its factorization.

68820353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404511 (or 1404504 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 68820353 is about 8295.8033366275. The cubic root of 68820353 is about 409.8003251394.

The spelling of 68820353 in words is "sixty-eight million, eight hundred twenty thousand, three hundred fifty-three".