68364157 has 8 divisors (see below), whose sum is σ = 72606456. Its totient is φ = 64146432.

The previous prime is 68364143. The next prime is 68364161. The reversal of 68364157 is 75146386.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22477081 + 45887076 = 4741^2 + 6774^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68364157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68364167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238 + ... + 11695.

It is an arithmetic number, because the mean of its divisors is an integer number (9075807).

Almost surely, 2^68364157 is an apocalyptic number.

It is an amenable number.

68364157 is a deficient number, since it is larger than the sum of its proper divisors (4242299).

68364157 is a wasteful number, since it uses less digits than its factorization.

68364157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12287.

The product of its digits is 120960, while the sum is 40.

The square root of 68364157 is about 8268.2620301972. The cubic root of 68364157 is about 408.8928228684.

The spelling of 68364157 in words is "sixty-eight million, three hundred sixty-four thousand, one hundred fifty-seven".