68530157 has 4 divisors (see below), whose sum is σ = 68559516. Its totient is φ = 68500800.

The previous prime is 68530151. The next prime is 68530159. The reversal of 68530157 is 75103586.

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 25745476 + 42784681 = 5074^2 + 6541^2 .

It is a cyclic number.

It is not a de Polignac number, because 68530157 - 2⁴ = 68530141 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 (68530151) 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, 10844 + ... + 15957.

It is an arithmetic number, because the mean of its divisors is an integer number (17139879).

Almost surely, 2^68530157 is an apocalyptic number.

It is an amenable number.

68530157 is a deficient number, since it is larger than the sum of its proper divisors (29359).

68530157 is a wasteful number, since it uses less digits than its factorization.

68530157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29358.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 68530157 is about 8278.2943291478. The cubic root of 68530157 is about 409.2235095283.

The spelling of 68530157 in words is "sixty-eight million, five hundred thirty thousand, one hundred fifty-seven".