68604157 has 2 divisors, whose sum is σ = 68604158. Its totient is φ = 68604156.

The previous prime is 68604143. The next prime is 68604229. The reversal of 68604157 is 75140686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56866681 + 11737476 = 7541^2 + 3426^2 .

It is a cyclic number.

It is not a de Polignac number, because 68604157 - 2¹⁵ = 68571389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68604857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34302078 + 34302079.

It is an arithmetic number, because the mean of its divisors is an integer number (34302079).

Almost surely, 2^68604157 is an apocalyptic number.

It is an amenable number.

68604157 is a deficient number, since it is larger than the sum of its proper divisors (1).

68604157 is an equidigital number, since it uses as much as digits as its factorization.

68604157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 68604157 is about 8282.7626429833. The cubic root of 68604157 is about 409.3707519867.

The spelling of 68604157 in words is "sixty-eight million, six hundred four thousand, one hundred fifty-seven".