68207857 has 8 divisors (see below), whose sum is σ = 72688896. Its totient is φ = 63853152.

The previous prime is 68207851. The next prime is 68207861. The reversal of 68207857 is 75870286.

It is a happy number.

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

It is not a de Polignac number, because 68207857 - 2⁷ = 68207729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68207851) 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, 30468 + ... + 32629.

It is an arithmetic number, because the mean of its divisors is an integer number (9086112).

Almost surely, 2^68207857 is an apocalyptic number.

It is an amenable number.

68207857 is a deficient number, since it is larger than the sum of its proper divisors (4481039).

68207857 is a wasteful number, since it uses less digits than its factorization.

68207857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63167.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 68207857 is about 8258.8048166790. The cubic root of 68207857 is about 408.5809698037.

The spelling of 68207857 in words is "sixty-eight million, two hundred seven thousand, eight hundred fifty-seven".