68305357 has 4 divisors (see below), whose sum is σ = 68648800. Its totient is φ = 67961916.

The previous prime is 68305343. The next prime is 68305373. The reversal of 68305357 is 75350386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75350386 = 2 ⋅37675193.

It is a cyclic number.

It is not a de Polignac number, because 68305357 - 2²³ = 59916749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68305387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171423 + ... + 171820.

It is an arithmetic number, because the mean of its divisors is an integer number (17162200).

Almost surely, 2^68305357 is an apocalyptic number.

It is an amenable number.

68305357 is a deficient number, since it is larger than the sum of its proper divisors (343443).

68305357 is a wasteful number, since it uses less digits than its factorization.

68305357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343442.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 68305357 is about 8264.7054998953. The cubic root of 68305357 is about 408.7755596931.

The spelling of 68305357 in words is "sixty-eight million, three hundred five thousand, three hundred fifty-seven".