68857567 has 4 divisors (see below), whose sum is σ = 69467040. Its totient is φ = 68248096.

The previous prime is 68857559. The next prime is 68857597. The reversal of 68857567 is 76575886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76575886 = 2 ⋅38287943.

It is a cyclic number.

It is not a de Polignac number, because 68857567 - 2³ = 68857559 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 (68857507) 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, 304567 + ... + 304792.

It is an arithmetic number, because the mean of its divisors is an integer number (17366760).

Almost surely, 2^68857567 is an apocalyptic number.

68857567 is a deficient number, since it is larger than the sum of its proper divisors (609473).

68857567 is a wasteful number, since it uses less digits than its factorization.

68857567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609472.

The product of its digits is 2822400, while the sum is 52.

The square root of 68857567 is about 8298.0459748064. The cubic root of 68857567 is about 409.8741771354.

The spelling of 68857567 in words is "sixty-eight million, eight hundred fifty-seven thousand, five hundred sixty-seven".