68353157 has 4 divisors (see below), whose sum is σ = 69121260. Its totient is φ = 67585056.

The previous prime is 68353147. The next prime is 68353163. The reversal of 68353157 is 75135386.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30481441 + 37871716 = 5521^2 + 6154^2 .

It is a cyclic number.

It is not a de Polignac number, because 68353157 - 2¹⁰ = 68352133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68353157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68353147) 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, 383918 + ... + 384095.

It is an arithmetic number, because the mean of its divisors is an integer number (17280315).

Almost surely, 2^68353157 is an apocalyptic number.

It is an amenable number.

68353157 is a deficient number, since it is larger than the sum of its proper divisors (768103).

68353157 is an equidigital number, since it uses as much as digits as its factorization.

68353157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768102.

The product of its digits is 75600, while the sum is 38.

The square root of 68353157 is about 8267.5968092306. The cubic root of 68353157 is about 408.8708909940.

The spelling of 68353157 in words is "sixty-eight million, three hundred fifty-three thousand, one hundred fifty-seven".